I think it’s less to do with the traits themselves and more to do with the person and how they’re perceived. As other people have said - people get more of a significant impact from role models they can identify with or look like them. There’s so much room for role models of all types, but if we’re thinking about masculinity specifically, so many young men and boys only have masculine folk in their lives who, for example, don’t share their emotions - and this pattern affirms the idea that it’s not ‘manly’ to be vulnerable.

More people who express themselves in a ‘masculine’ way modeling these positive traits show other people with similar identities and expressions that it’s possible (and good) for them to do it, too.