It's kinda like music theory - if you're already a talented composer, music theory helps clarify a few technical mysteries and sheds light on other composers' work. But it tells you nothing about creating interesting music, and it's typically apparent when a composer writes according to theory rather than according to their own ears.

Likewise I think some sophisticated humorists would benefit from reading philosophies of satire, psychology of slapstick, etc, to help hone their craft. But those are not how-to guides.