Not everyone is going enough times to disney that they know this is bad. Everyone I know either rarely goes to disney, or is going for the first time. These people get there and don't want to miss out on stuff because they dont know if or when they'll ever be back, which is even harder when you need to explain that to a little kid.
So they pay up, come back and tell me happily how they did everything they wanted... but then acted shocked at the frequency I go to disney. Because to them it was a way expensive experience that isnt worth going back too soon
Disney succeeding in squeezing more money in the short run... but in the long run they've given guests the impression that disney is not feasible repeatedly, as its so expensive, so they decrease the times they go back, if they ever do.