Because music, history, and literature are just as important to human society as math, computer science, and physics. This unthinking disrespect for the humanities is embarrassing.
Embarassing is an understatement. It is one of those cases where people don't know what they don't know ( unknown unknowns ).
Unthinking respect for the humanities is embarrassing. Exactly why do they deserve respect? (hint: they don't)
So, the only thing in life you enjoy is math? Because if you enjoy music or tv or novels or dance or sport or anything else, you enjoy something that doesn't deserve your respect. And why would you enjoy something like that?