That sounds nice, but in the short term, many of these sites are causing people to risk losing their source of income. So many sites have had to crack down on NSFW content due to the payment processor cartels threatening to cut them off, and while theoretically they have alternative options for taking payments, in practice they don't, because most people are not going to jump through the hoops of mailing in a cheque or buying crypto just for an NSFW art commission.

To some this might not really feel like much of a loss, but since the payment processors are maliciously vague about where they draw the line, companies often overreact and also threaten artists whose most NSFW art might be a character in swimwear.