Why are men viewed as older/old in their 30s?

“He's aged like fine wine” um he’s only in his 30s. I would hope most men aren’t struggling to stay attractive in their late 20s and 30s. 30s is too young to be considered “aging like fine wine”, yet for some reason men love saying that about themselves.

Men in their 30s are old
Men in their 30s are not old
Select gender and age to cast your vote:
Why are men viewed as older/old in their 30s?
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