That's really not true unless you either cut out a large amount of humor such as physical comedy or stretch the meaning of political to uselessness.Comedy is almost always political. Like, despite what some people might want you to believe that haha funny things have no meaning save for being haha funny, a lot of humor is fundamentally political. The reasons for why some things are funny and some things aren't funny are shaped by society-and thus you can't be humorous without sending some sort of political message, whether it's inadvertent or overt.
The Large Hadron Collider hasn't found the funon particle, the fundamental unit of comedy, for a reason. Comedy is cultural, it's integrated with society, and thus good comedy is also politically aware.
Lots of great comedy is political at some level but not all of it is. Sometimes a skit moves between the two even! Look at Monty Pythons Lawrence of Antarctica. You get a clearly political bit about Hollywood and gender roles followed by an apolitical lion fighting scene which is an absolute gut buster.