Because women should be free to show strength and men free to express emotions. And if they cannot without being judged or shamed then we're all worse for it. Cliches like those stifle our humanity and increase suffering.

Not to mention limit information dispersal.

Men tend to suicide more often than women. Men are also more likely to killed/be killed (although this is slowly changing).

Is it because men are intrinsically more violent than women? Or is it because of the way we bring up our kids? It's still unclear.

I went through a depression a few years ago. I noticed that my suicidal thoughts were related to my inability to express my feelings. I don't think I'm the only one.