I've always been curious about the effects on minors as well, especially with a country like Japan where sex is much more widely accepted and pornography is just out on display in some stores. From what I've heard, Japan has always had the mentality that porn would be either unappealing to minors or, specifically for games, would be to difficult for them to actually play because they'd have trouble reading the text. I know that Japan has done studies on other porn related topics, so maybe they have in the past and were able to come to this conclusion.

There is a lot of manipulation, drugging, exploitation, and straight up criminal activity that a large porn industry begets.

I'd be curious to see the stats, but I'd be shocked if this hasn't gotten much better since like the 70s-90s. For one, OF does allow for freelance work. Also, I've seen more and more professional porn outfits that are created/run by women.