Kind of a false equivalence, since you're not educating yourself on memes exclusively (and if you are, god help you lol). Even in your own reference, you can absolutely make dirty jokes after sex ed, especially if it helps you remember the topics. Good jokes will both reinforce the right narrative, make it more approachable, and help people remember what matters on a topic. Still has to be a good joke though, and humor is subjective so hard to gauge.
I mostly draw the line when it targets a vulnerable person or persons (like, let's not joke about rape), or makes someone in the room uncomfortable out of respect for that person (like a dirty joke in front of grandma). I suppose one could say any joke about the assholes in charge fall under that first category, but they harm vulnerable people, but they themselves are perfect targets.