While I agree overall, I definitely agree with that last sentence. As someone who originally joined the Fediverse for the first in March via Mastodon, I've since then spread out and tried the many other fedi products (is that even the right word to use?) and have since settled on a Misskey forked server called Foundkey for my "Twitter" experience. While I agree with others that Threads being part of the Fediverse is good, I also agree in that the familiarity with Meta/Facebook will make people not want to branch out and explore what else the Fediverse has to offer which in turn hurts everyone else.