My counter claim is my experience with dogs.

Over the past 50 years, I've a bunch of different dogs from mutts that showed up and never left to a dog that was 1/4 wolf and everything in between.

My favorite dog was a pug who was really dumb but super affectionate. He made everybody around him happy and I think his lack of anxiety and apparent commitment to chill had something to do with it. If the breed didn't have so many health issues, I'd get another in a heartbeat.