Like everything else, Trump wants to dictate what is admirable and what isn’t in American culture. To that end, he has taken over the Kennedy Center and changed its programming. He is also conducting a review of the Smithsonian’s exhibits and commenting frequently and stridently about sports.
But his power in this field is limited. If you don’t take federal money, he has no control over you. He can’t make you watch professional wrestling at the White House no matter how hard he tries, and he can’t force MLB to put Roger Clemens in the Hall of Fame.