>>39279312Because it's more or less the industry standard, proved countless times to sell well. Evidently most people who buy doujinshi find the contrast between beautiful girl and ugly guy hot, it accentuates the power dynamic and domination/degradation aspects.
Besides, it's either faceless oji-sans/younger guys or the next default option, Ash. Do you really want 90% of eromanga to feature Ash fucking all the girls? Artists like Tamagoro who prefer to use video game MCs are quite rare.
