Pretty decent list. It covered a lot of the myths I think about.
One myth you mention that I see a lot is the idea that people you don't like won't be on the fediverse. On the face of it it's an absurd idea -- So anyone can start an instance and run it however they want but somehow it's going to be more locked down than big tech sites that spend millions of dollars on moderation?
The myth that "it's all called mastodon" that you mention I feel is less like the gnu/linux distinction, and more like your mom calling every video game system a "nintendo". I'm running 6 different services that use some form of federation, and none of them are Mastodon (nothing against the program, it's just that I've always been running with system performance at a premium so something heavy and scalable like that wasn't on my radar)