Can't argue there. Ofcourse, comedians will have to reflect within mainstream society's perspectives, else there be no connection.
I also agree, that most popular 'genres' of comedy are presented with strong satirical flavor. You can find this type of flavor in a vast majority of comedy stunts and sketches. Which should actually tell us something about the nature of humor we are prone to.

There is no line that can be drawn clearly anywhere, but once a comedian crosses the threshold from a general satirical presentation to politically partisan, it's rather obvious who and what he lends his talents to, which than, in most cases, infringes the purity of humoresque scurrility, no matter how bizarre.

Btw. sex may closely rival politics as a preferred topic in popular comedy.

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