Which is a problem for a lot of reasons, not the least of which is the fact that it makes people underestimate how bad real BPD is and how awful it is, if you have to deal with that shit from a BPD firsthand.
Once a BPD has made up their mind about you ( oftentimes using evidence they have fabricated in their own head or overanalyze conversations/ interactions till they conlude you're evil) they will do everything in their power to ruin you, because they feel that you deserve to be punished. It doesn't matter if you've done anything anything or not.
Now, some of you here may be reading this and thinking: "I've known an abusive man or two, that's actually a lot like that like that." And there's a good reason for that. BPD is overdiagnosed and associated with and demonized with feminine traits and characteristics. But it's severely underdiagnosed in men, and abusive men often have these same tendencies. They're just coddled by society and seen as acceptable. A man has a meltdown, black/white thinking, splitting with idealzation/ demonization ("you're perfect baby I want to marry you/ i know you've sucking a million dicks and cheating on me. I don't need evidence because I'm a man and I can yell, and threaten, and scare you into agreeing with me, which proves that I'm right, you whore".) and can't regulate his emotions? He's a good boy and its your fault for upsetting him!
So many moids are Ethan Ralph-esque BPDs, and nobody wants to admit it.