That feeling makes sense, but I think everyone knows that the Fediverse wasn’t created specifically to give them a landing in this event, just like Reddit wasn’t created to catch the Digg refugees, etc. More of a “next phase in the evolution of this concept”, and while it took a catastrophe, they’re ready to consider that it’s time to move on now.
The trick is going to be walking that line between preserving what made the Fediverse great and not alienating the newcomers. I think there’s room for everyone, though, and really the big advantage of the Fediverse - we don’t have to agree to co-exist, and can even co-existing completely separately if needed.