Maybe it's because of radical self-acceptance, (or low standards according to some social lens), but honestly I can't imagine a single role in any movie I would be offended to have. I consider it an honor to be attached to any piece of art, as it only increases the breadth of my identity's perseverance. If it's a piece of shit film, it is either never seen or hilarious in my mind.
Not to mention that these are background actors, hardly any uses will be problematic anyway.
As for losing the "stepping stone" into the industry, I think that is just a hyperfocused perspective on a broader societal problem transitioning to the postcapitalist AI singularity.