Stereotypes describe a generality that may or may not apply to the majority. Despite the fact that it doesn't apply to the majority, the stereotype itself still describes an actual real-world generality. Coming to a conclusion based off of a generality/stereotype is not totally unfounded.

I mean this guy called himself an asshole because he came to a very probable and realistic conclusion. Sometimes I think feminism goes a bit too far;... especially when the topic takes up 50% of my news feed nowadays.