I'll probably regret this, but for shits and giggles, I'm going to try and give an earnest answer here.

Let's first assume that "manhood" is a thing. That there are people in the world who define themselves by gender roles, however those manifest. It might be biology, appearance, dress, behavior, profession or any number of other ways that someone chooses to manifest a gender role.

So if we accept that, there's a lot of ways of approaching what western society might call "manhood": machismo, aggression, breadwinning, vinyl collecting, having the best lawn in the suburbs, etc. This is where things get dicey, in my opinion. The right is full of angry men who feel slighted by a society that they feel increasingly has no place for them. In some ways they are right: men are less likely to have education past high school, less likely to have modern workforce skills and less likely to have their formerly tolerated bullshit accepted anymore. This has lead to the rise of what people often refer to as "toxic masculinity". People who lean into traits like misogyny or racism and follow leaders who make them feel tough, like they are in the driver's seat again.

I think the appeal of Walz is that he gives at least the appearance of another path. He's a man, no question. He hunts, he fishes, he works on his pickup truck, he coached football, and he taught social studies. But he's also championed reproductive rights, LGBT causes, and even took a fairly light hand during the BLM protests in 2020 (which can be easily twisted, unfortunately). He's the kind of pro-labor and pro-rural progressive that started to get marginalized in the 2000s, was on it's death bed when the Tea Party ascended and that MAGA seemed to finally bury.

So yes, manhood is an issue because that seems to be a major part of the ethos that is following the alt-right. But Walz is a man that a lot of men can see themselves in: men who work, love their families and who want government to support their lives, not some fantasy they wish existed. Government that does infrastructure, public safety, boring stuff that we used to not have to think about. And because he's done all those "manly" things he feels like the old fashioned man that a lot on the alt-right claim to want back, while showing them that old fashioned man is not what they think it is.

So there it is. I admire Walz. He's not perfect, but neither am I. I hope he doesn't disappoint me.