But female dominated positions aren't "diversified" because it's one of the few places where a woman actually gets a shot at a job. This is the entire purpose behind "diversification": minorities and oppressed groups don't get a fair shot at normal jobs, so they have to get lumped into jobs that society thinks is "appropriate" for them. So, while I think you are misguided in your criticism, I agree that we should root out why exactly women are relegated to being the majority in only a few select stereotypical positions.
"Toxic masculinity" is not nonsense. I'm a male and it's easy for me to see what toxic masculinity looks like. Misogyny, homophobia, violence, and other forms of oppression are all traits men overwhelmingly exhibit more than women. If women acted like this we would label it and talk about it and we wouldn't be called bigots (except by the people trying to deny that it exists).