You're suggesting that anyone that doesn't aspire to be a hero is weak.
This isn't about "aspiring to be weak". It's about being "allowed to not be aggressive."
It's because not every person wants to be a warrior. It's not in their personality. There are plenty of people that are confident and brave, but want nothing to do with competition. If that person happens to be female, they're allowed to do that - our society has a role for women who prefer to nurture, not fight. If they're male, there is no such equivalent role - they're judged to be a failure.
Do you think the reason that many girls aren't interested in violent movies or games is because they're weak? What if that girl is a boy, is he allowed the same latitude?





