Is there some social pressure not to date psychopaths that I'm not aware of? I'd be surprised if trying it got you much besides some concern from friends and family tbh. Doesn't really strike me as a reason to suspect 'brainwashing'.Maybe society is brainwashing you into thinking that, it's not like a lot of things we thought were a lot more obvious than that didn't turn out on their heads
In this case my reasoning is simply that I want a relationship to be a two-way thing and someone who appears incapable of caring for others naturally makes a poor candidate for that. There are plenty of other problems that can make someone hard to be around, but not many inherently defeat the purpose.