It is unfortunate that a request for a citation is downvoted but not responded to. Not only is the claim that every comedy writer is conservative not supported, it's not even true.

[0] https://en.m.wikipedia.org/wiki/Rob_Long (example of conservative sitcom writer)

[1] https://en.m.wikipedia.org/wiki/Adam_Sandler (example of conservative movie actor/producer)

Now, I don't subscribe to conservative politics myself. But it is simply a moral wrong to assume an entire profession is united in political views. Nor is it a good thing to invoke such identity politics. Let's move forward and focus on the real issues at hand.