Obviously not every man with a gender identity is going to be objectively a danger.
However any man walking into a women's space has declared by the act of doing so that he has no respect for women's boundaries or needs, has a sense of entitlement to women's spaces and the women in them, and at that point, yes, is a walking red flag for dangerous and abusive behaviour.
I'm not interested in how he identifies at that point, or whether he wants to be with me as I get undressed (regardless of my consent) for his emotional gratification or his sexual gratification. I don't want to be used at all, and the fact he has no respect for me or any other women makes him a threat.
If he does not want to be perceived in that way, he needs to not abuse women and women's spaces. It's not about trying to convince women to abandon boundaries, any sense of self preservation, or being more open minded about whether they're about to be a prop in someone's sexual fantasy or be assaulted because he might be nice. He isn't nice. If he was, he'd care about women. It's about basic respect for women's equality and needs.