Kids, like adults, love it when bad things happen to bad people. So Disney movies always make sure the villain gets what they've got coming to them in the end. And, sometimes, Disney gives them what they had coming, and then way, way more.
As happy as they were to give us the occasional nightmare, Disney's favorite way to misshape our world view was to coat classic stories in a suffocating saccharine wrapper, damning us all to a lifetime of naivety.