I agree that we're not to the point of "everyone just be a human being" but the "box" for women is quite flimsy at this point because women have fought hard for that to be the case. Want to be an underwear model, great; want to be an astronaut, great - for most women there is no stigma to either of those choices. Men need to do the same to their "box" (and women need to let them).
I've mentioned before that my autistic 24 year old son is clearly a young man (he's not nonbinary), but because he has no perception of social messaging around what is appropriate for him, he is a man in his own way, including doing some things that are not coded for men. I love that about him and for him and wish more young men had that opportunity to just be themselves.
One of the things that patriarchal dominance hierarchies do is foster and encourage insecurity. They teach us all, but men in particular, to take their sense of self from comparing themselves to others around them - rather than seeking that from the inside. Jordan Fucking Peterson really ought to be encouraging young men to find and cultivate themselves in a substantive way rather than adhering to 1950s era gender roles. It would go a long way.