While this doesn't take away from your point, I'd just like to mention that Vernon Unsworth isn't actually one of the two British divers who saved the kids (contrary to what the media seems to be implying). He is just one of the many divers who tried to save them.

Also, the diver was unnecessarily aggressive and condescending toward Elon Musk (who was just trying to build a submarine to save the kids), which is what actually prompted Elon to insult him.