IMO it’s more about the vibe than whether porn is their main source of income.

Is she really horny or just acting?

If she’s really horny, then it just comes down to whether or not I find her physically attractive, which is partially based on looks and partially based on how she physically displays her personality.

If she isn’t really horny, someone acting like they are horny when they aren’t is personally a turn off. Things like moaning as if she’s about to orgasm while just giving a blowjob, random ahego face, thirst trap captions… Enough of those and it doesn’t matter how hot I find her otherwise.

Professional porn tends to be more of the latter. Once the novelty wears off and it goes from “I’m getting paid to fuck!” to “I just gotta have sex to get paid”, it loses that sense of genuineness.