The hope is it’s changed somewhat for the better now but studio porn is an inherently exploitative and abusive industry and the performers tend not to be the mentally healthiest people to begin with but it’s certainly exacerbated by the needs of the business and has made hundreds and potentially thousands of people’s lives objectively worse.

Ruined? Majority? That’s subjective or untested, but porn has been a bad thing for many many people involved and that shouldn’t be whitewashed.