Or because they have no other choice. It's mind-boggling that the very people responsible for creating this landscape have the audacity to throw up their hands and try to absolve themselves of responsibility for the things they built by saying "idk the users just love being screwed". We must do better.
Meaning what? Name-and-shame clearly won't do the job. The only solution I can see is for there to be laws against dark patterns. The profit incentive for user-hostile design isn't going to go away.