This certainly can be the case when it includes someone underage, a power imbalance, and/or a lack of consent. But I think you'll find a shortage of evidence supporting the harm you mention when it concerns consenting adults.because that kind of relationship is mentally damaging, regardless of how it manifests
it does permanent, significant damage to a person's mind and ability to function socially and emotionally
preventing people from hurting themselves is the reason why nearly all laws exist
I agree that no matter what line you draw in the sand, there will be arguments for and against it
Regardless, I'd be very surprised if it ended up here given Patreon's policies and Cari's statements.