> Most workplaces are highly filtered. The whole interview process is specifically geared towards filtering out undesirable people.

This just isn't true or is born from a standpoint of extreme luck. Like have you genuinely paid attention to the people you work with? Coworkers, CEOs, the stuff people say in slack channels or the things people gossip about at work? The only way I think someone can genuinely hold an opinion like this is by being so unaware of what workplace politics that they are unaware that most workplaces are like Highschool 2. Even the professional ones. Especially the professional ones.

It's absolutely undeniable that interviewing is meant to filter out undesirable behavior. What in the world do you think it is? So many people cannot just walk in and start working next to you, very few will be selected.

You are pointing out behavior that is different, but not undesirable. Which is not being discussed. i.e., kids who distrust other kids learning is undesirable. As would people who create hostile work environments, or are inefficient, or unreliable, or don't have the right connections.

In my place of work people nearly universally went to top end universities, a much larger proportion than the normal population have phds. you think that's random? And more locally if you work on a sales team you are going to be hired to work directly with people that have certain shared traits that make them effective sellers. It's so obvious that interviewing is an active filter I'm not even sure what to do to convince someone that thinks otherwise.

I'm not sure how you equate any of that to workplace politics or gossip. Even if it was relevant, the fact that it is not a perfectly effective filter doesn't make it not a filter.