There's arguably more to manliness than being an adult human male. It has less to do with machismo than about being a *responsible* adult. For instance, some people try to normalize bad behavior by saying "boys will be boys". Maybe, but boys still have some growing up to do. A boy isn't a man.
Shaming tactics can be harmful when directed toward personal hobbies and preferences. Not every man is a rough-and-tumble kind of person. Many are not, and prefer more aesthetic or intellectual pursuits, yet they're still real men. To suggest otherwise is counterproductive. However, I do think it's okay to feel a moderate amount of shame over irresponsible choices. Not so much shame as to fall into a pit of despair, but enough to provide motivation to become a better person. To "man up", so to speak. The distinction isn't between men and women, but between men and boys.
I'm not defending the kind of preaching we see about being a "real man" or not being a "sissy" that we see so much of these days. Most of that is misguided at best. I just think there's more to manliness than being a male human over a certain age.