Disney represents the "safe choice" of movie selections.
What they release is rarely good, but almost never below average, and heavily geared toward appealing to the general public, with always high production values (so the movie will always "look" good).
For many people, watching Disney movies is investing their time and money into something they know will be okay at worst without thinking too much about it.
Disney has also successfully created a culture around watching their movies. So if you choose to not watch their "safe", general audience appeal movies, you are liable to be left out of social conversations if you don't watch them, if you care about that.