They are talking about a trend with straight people, not accusing every straight person of being a rapist. Rule of thumb, if someone critiques an identity that you are a part of and the critique doesnt apply to you then its probably not about you. Coming in and saying this type of shit makes you seem like an asshole who isnt listening to marginalized peoples' struggles. Like for example I hear houseless people complain about nurses and doctors a lot because they tend to assume they are dope-seeking. If I was a nurse, I would listen and do my best not to be the kind of person they are talking about. I would not tell them "You should stop generalizing, cause I don't do that." It feels very invalidating and makes you come off as very self-centered. I aint gonna say people couldn't rephrase better to avoid over generalization, but just saying that lets stop making it about ourselves when people are talking about real and serious problems affecting them. Be an active listener and dont be a part of the problem if you aint gonna be a part of the solution