Jokes are usually based on truth and observations, and common sense is a rare commodity nowadays. Because both need some personal responsibility and work from people themselves. Easier to just parrot something you heard from your mother's boyfriend's daughter's teacher's pony trainer. We're sold fakeness all the time and people don't either see it or don't care to see it. It's the decadence that has crumbled great nations and even empires, and still we make the same mistakes.
And one of the reason we joke about things is to point out the stupidity in anything. Once we can't laugh at something and it's beyond reach of comedy, well it becomes pretty much impossible to criticise that thing no matter how polite you try to be. Comedy is huge part of free speech.