That only really applies to coders. Most jobs are social, so you'll want to hire people that are more or less normal. In many work places they even want people that are pleasant to spend time with!

Some people have great coding skills, but are right assholes or otherwise seriously toxic. You definitely need to look for more than just "great coding skills" if you want to hire great employees.

Sure, but I don't think "making a good impression in an interview" has a very strong correlation with whether someone is a "right asshole or otherwise seriously toxic." Plenty of decent people don't interview well, and plenty of assholes can put on 'interview face' to get a job.

Most assholes are thinly veiled in an interview. Decent people are nervous, and that’s okay - it’s usually pretty clear. Assholes are trying /hard/ not to come off as such, so when the interviewer inevitably challenges them on a piece of code or their background, they usually end up showing their true colors, at least in my experience.

That’s funny because the last bit of feedback I received on an interview that was supposed to be a “preemptive yes” is that I was “a bit nervous” and they wanted to interview more candidates before making a decision. Sometimes you just can’t win.

There is probably no fool-proof method to weed out these people – just as there is no fool-proof method to weed out non-great programmers – but that doesn't mean you shouldn't try.