For the gluten part, most of the major plant-based meats are gluten free: beyond is, impossible is, etc. They are also not the only option of course either as dishes don't need to use any plant-based meats and can say be bean based or lentil based

For the individual part, the problem is that as long as people expect to consume meat, dairy, etc. in mass, factory farming is the invariable outcome. There really isn't much way away around requiring changes to consumption levels. For instance, something like grass-fed production couldn't even supply a third of beef production, and would even raise emissions as well

We model a nationwide transition [in the US] from grain- to grass-finishing systems using demographics of present-day beef cattle. In order to produce the same quantity of beef as the present-day system, we find that a nationwide shift to exclusively grass-fed beef would require increasing the national cattle herd from 77 to 100 million cattle, an increase of 30%. We also find that the current pastureland grass resource can support only 27% of the current beef supply (27 million cattle), an amount 30% smaller than prior estimates

[…]

If beef consumption is not reduced and is instead satisfied by greater imports of grass-fed beef, a switch to purely grass-fed systems would likely result in higher environmental costs, including higher overall methane emissions. Thus, only reductions in beef consumption can guarantee reductions in the environmental impact of US food systems.

https://iopscience.iop.org/article/10.1088/1748-9326/aad401

Yes, I pretty much exclusively travel abroad. I really don't find it difficult anymore. Maybe early on, it was annoying, but now I don't even think much about it.

I don't regret missing out on the aspect of cultures where people abuse those less fortunate. There are many aspects of peoples lives and cultures that I don't take part in, but I still have a rich experience when visiting them. I don't intimidate women into being uneducated, or try to take child brides, or mutilate the genitals of babies, or get blackout drunk and provoke fights, or many other things that are a part of various cultures that are just not for me.

I understand that different people are in different economic situations, and for some people, they have no choice but to eat processed factory farm products to be more healthy than without. It is a shame that that is the case, but I don't see people in that situation as being immoral. They just have their own situation to weigh.

On the practical side of things, it is easy to refuse food, I am fine just saying that I can't take it for health reasons if I dont want to get into it with someone. If I want restaurant food, it is generally easy to find Thai, Indian, or to eat a simple salad. Honestly, almost all decent sized cities have specifically vegan restaurants these days, and even more have restaurants with some vegan options. On top of that, I try to do a few week long water fasts each year, so If I ever do find myself in a situation where I absolutely can't eat a meal or something, it really doesn't bother me much.

I do eat food from locals. Even the most meat obsessed cultures still have plenty of traditional foods that don't include animal products. If I am around locals who want to make food for me, then I often get to have a wide range of dishes because they want to make sure I am full. I am very fortunate to be able to travel like I do, so not squeezing every ounce of pleasure out of the misery of others is a small price for me to pay.

My other response to you was so long-winded, and there was even more that I wrote that maybe wasn't directly relevant to your comment, so I removed it. I did write it, though, so I figure I'll just go ahead and paste it here:

I'm actually not even philosophically strictly vegan, although I am vegan in practice. I just weigh the cost/benefit when making decisions. I decide if the questionable nutritional benefit of drugged up animal parts and 20 minutes of pleasure to me is worth a lifetime of cruel conditions and misery for this animal. It just happens to be the case for me personally that I think whatever potential health benefit I get from it isn't worth such an extreme cost to the animal since I am fortunate enough to be able mantain a healthy body without that. I would feel much better if I could verify that the animal has had a happy life.

For instance, in scotland, there are sheep that are free to roam the unfenced highlands anywhere they like with their babies, and they choose to go back to where the farmer they are used to feeds them in the winters. When they get old, the farmer will quickly kill them, and this is very much in line with their life over countless generations. Philosophically, eating that kind of meat has a much lower cost to me than the cruel factory farms where much meat/animal products come from. That said, at this point in my life, even that cost is not worth it to me, but maybe some day that will change. I can see the argument that maybe killing them at a certain point could be seen as mercy, but still, I'd just rather not at this point in my life.

Not the person you asked, but in my experience, when I travel I will go to grocery stores often. I personally love seeing what grocery stores are like in other countries, so that ends up being quite a fun experience (for me). But more importantly- it lets you stock up on stuff that you can eat. You have to learn what foods are enjoyable for you to consume cold, or with minimal prep, but in the end it’s not too difficult.