There's something like 50 million Threads users. Chances are there's at least a few people out there who would be happy to be able to connect with at least some of those 50 million people, without having to use Threads themselves.
As an academic, I would just be happy if I could reach my peers on Mastodon. I don't really give a fuck which platform they choose to use - I've chosen mine, and that's enough for me.
Furthermore, what's even the point of open standards if you don't want them to be adopted.