The reason porn pays is because so few woman are willing to give up their dignity for the sake of temporary cash flow. If everyone did porn, people would be making scraps.
You’re making a basic supply and demand argument. As supply goes down (i.e. becomes scarce) and assuming demand remains constant the cost will increase.
If you’re selling apples. And 100 people want apples. The price you charge will fluctuate depending on how many apples you have. If you have 10 the cost goes up. If you have 1,000 the cost goes down.
My argument is pornography is not scarce. Meaning there’s a lot of it available (on the market) so I disagree with your assessment as to why “porn pays”