Uh, old films are not everyone's cup of tea. But I sort of hate the kind of people who insist on holding decades-old films to the same standards as if they were made today. Yes, sometimes they will be racist, or misogynist, or whatever to modern eyes. Doesn't mean you can't enjoy them for what they are.

And enjoying the dance, music and choreography is a perfectly valid reason. That being said, you can't force someone to like something - you can just question their taste.