No one is saying Brock raped the woman because he’s a rapist (do you think we are idiots?). You’d have to get a psychologist involved to be really sure, but it certainly sounds like he believes (was raised to believe) that his needs/desires trump others, that he can do no wrong, that it’s possible to escape consequences by laying the blame on others, or on some amorphous “culture.” (Sound familiar?)
I’m sorry, but you are either doing a really bad job of communicating your meaning, or you are expressing something that is uncomfortably close to Brock’s own excuse. If your point is that the people who commit rape might be ordinary in other ways, well, yes. Except in the important characteristic that they chose to violate another human being. And the rest of us don’t have to accept or excuse that, or avoid using the appropriate term for such a person: a rapist.