It might be easy to brush off my complaint as a case of paleo-pedantry, but word choice matters. “Dinosaur” is a word for a specific group of creatures united by shared characteristics and which had their own evolutionary history—it is not a catch-all term for anything reptilian and prehistoric.
We have known about this distinction for a long time, and I bet that your average 10-year old paleo fan would know not confuse the groups.
The joke is that birds aren’t only related to dinos, but are dinos themselves.
Yes and the cruel part is… Pterosaurs are not Dinosaurs!
https://xkcd.com/2501/
So, it’s a joke about the fact that both are essentially dinosaurs?
… nope, I got nothing …