There's no evidence in actual psychological literature that porn is harmful to people beyond making some religious folks feel a little more shame than normal. Porn addiction isn't an actual psychological condition.

I question the bit about sex trafficking. From my perspective a lot of consenting adults are making a lot of money by willingly participating in the industry. If someone is abusing that and forcing someone to participate, that's already a crime that should be prosecuted. It's not an excuse to shut down commerce between consenting adults.