The part of the equation that can change, is the consumer variable.

No. I mean yeah, but we can change in so many more ways. that matter more. I think we need a multitude of approaches.

You can get active politically. Call your representative. Help get a better one elected if you can help out (and keep an eye out for a better one next time). You can learn to have those difficult conversations with friends, neighbor and family if you are good at that. Not all of those work for everyone. Some will swear up and down that direct action is better than getting involved in local or provincial/state elections. Then do that which you think will work.

As far as consumption goes, I tend to think withholding your consumption won't do much (there are plenty of people who don't care who will keep consuming, and we will look like a rounding error). However, I think support for alternatives matter more (whether they be habits which we spread in the population, or alternate products, like legumes instead of meat. Which I guess is also kind of promoting a habit. By forming communities that live our values, we can cause other people to be exposed to them and see how it can work out in practice. Hence eating more vegan foods bring those out. My hope is that such movements (and sometimes, as for vegan foods, markets) will grow exponentially at some point if it catches on.