I have a hard time believing this mostly because of your attitude towards it. Is it stupid and that's why you don't like it? Or you don't like it, and therefore it must be stupid? Seems like the latter. I'd also disagree that it's not a useful skill, like any soft or social skill it has its place and it can be surprisingly useful in certain circumstances. For instance, is it useful to be able to impress your preferred gender of person? Or to make them laugh? Dancing can definitely help with that.

When I was younger I thought golf was a useless "dumb" sport, I'm now kicking myself for not picking it up a decade ago because it's extremely useful for networking and building/maintaining relationships.