They ALL do it! When they made a movie about Roald Dahl’s “The Witches” They shoehorned a good witch into the story just so she could change the mice back to boys at the ending. I can still get upset over that, because the rest of the movie was damned good— But yes, Disney is the biggest offender.
I especially hate Disney’s Little Mermaid. What the hell is the point of that story?
But, fair is fair, I have to mention here I think Disney is hard at work redeeming itself. I approve of their more recent films, where they allow themselves to be inspired by a classic tale and re-imagine the whole thing, not just the ending and the moral. Movies like “Tangled”, “Frozen”, “The Princess and the Frog” and even “Maleficent” are not without their problems, but they don’t anger me as much as the old movies do.