Why is calling a man insecure considered a knockout punch argument for BPers but calling a woman insecure is meh, who cares?

I have my own reasons for why I think this is. But often times you'll see on this sub that if a guy doesn't want to date a promiscuous woman seriously or even consider women with high N counts as being worthy of a relationship he will get called "insecure" by women on the sub (and white knights too). They'll say you're just "insecure" about your sexual performance, penis size, masculinity, etc.

This is considered to be a knockout punch retort to the very real statistical evidence that men are better off avoiding promiscuous women for relationships (higher rates of divorce, cheating, etc.).

Why? It seems no one really bothers calling women insecure that much but even when they do get called insecure no one really cares. There's no penalty for being an insecure woman really.