And if Dinklage said it, I wouldn't have bothered to say anything, even if I still have thoughts on that topic. Because he has the right to tell jokes about his experiences. But the fact he didn't say it is worth highlighting.
There is a lot to be said for the psychology of humor, with a wealth of research about in-group and out-group humor (mostly from a race and gender perspective, because people with disabilities often experience poorer educations) that dives into how humor is often used as a strategy to survive and compete. Ford, Thomas & Breeden, Christopher & O'Connor, Emma & Banos, Noely. (2019). Jokes and Humor in Intergroup Relations gives a decent overview of some of the topics, if you're keen to dive into academic communications articles.
I also find that jokes made by members of marginalised groups are often more nuanced than they may seem to non-members, because they're backed by lived experience and a better understanding of the social factors at play. Sort of like the jokes in kids movies that are actually targetted at adults. The kids laugh because it's silly and over the top, but the adults laugh because they know what the joke really means.