There are a lot of weird, inappropriate people in the world. And a percentage of them become actors.
Those actors, with their flaky, rude, non-professional, and loony behavior, have spoiled it for the rest of us.
At least it can feel that way.
It can feel like a majority of industry folks (after a couple close encounters with those kind) have concluded that it’s safer just to assume all actors are “psycho until proven otherwise.”