Why is it so hard for people to accept that it's probably a good thing not everybody wants to do exactly the same things as they do? Do you really think that if everybody focused their life on any single intellectual venture you picked, we'd live in a better (or even functioning) world? Or that people who enjoy X and don't like Y (or simply don't like it as much!) should just deal with being unhappy so you can conclude that Y is the One True Intellectual Pursuit?
I don't think that's the argument being made. But that by learning X or Y, you can add a lot of substance or perspectives to your life that you may not have had before. These 'things' more likely than not can bring many positives to aspects of your life that aren't related.
