I'm going to vote this up for the discussion, but I don't agree with your perspective.
On the surface you are correct that being able to speak to people who are on Threads would, in theory, be nice. The suspicion is that Meta is going for the EEE strategy. Allowing ourselves to be "embraced" would ultimately be damaging for the platform.
We've just started to move from Reddit to Lemmy and have shown we don't need centralised, corporate-owned channels of communication. I don't think we should stop this direction of travel when it comes to Threads.
It's a valid question and I understand your point, but it becomes an issue for me when I end up being caught up the a snowball effect and need to use a bad app too. Here in Europe, WhatsApp is an example of something I'd rather not use, but because it's the platform everyone else is on, it's very difficult to avoid. The parallel I see is if Twitter is supplanted not by Mastodon, but by Threads, then that is the place people will gravitate towards and then the privacy friendly version becomes less useful due to lack of users and content.
Of course it is an option to just not use these apps, but the preferably outcome is that I am able to have the nice experience without sacrificing my privacy.