But they weren't always clearly useful and important. The value of Cantor's work was once so not clear that many serious and influential people dismissed and attacked it.
Would you like to not be one of those people? Then you should probably practice talking about why certain art is bullshit, and certain other art isn't bullshit, because it will strengthen your "is this bullshit" muscles, so you can more expertly apply those muscles to really important questions, like "are self-driving cars feasible within the next few years", or "do covid booster shots make sense".