Your obsession with volume and porn mods is a classic midwit deflection from the core reality of design competence. You are hiding behind Sturgeon's Law to protect the feelings of developers who cannot even balance their own spreadsheets. Nobody cares about the trash at the bottom of the pile when the peak of the mountain towers over the original vision.

Bringing up ROI is the ultimate sign of a hollow mind. You judge the quality of a meal by the cost of the kitchen staff. The actual taste of the food escapes you. Modders provide the refinement that these developers are too cowardly or too incompetent to implement. Those millions of hours of output you dismiss are the only reason half these games remain on anyone's hard drive.

The wide audience argument is the death of art. Catering to the lowest common denominator produces the exact kind of grey sludge you are currently defending. You mistake a lack of vision for professional restraint. You are the kind of person who looks at a masterwork and complains about the price of the canvas. You have no understanding of how systems actually function. Stick to your spreadsheets. Let the people who actually play the games (the way they should have been played, pushed to their limits with mods, hacks, etc) talk about what makes them work.