The entire point of a platform like Twitter / Bluesky is reach, not privacy.
Posts and discussions there are meant to be public, and highly visible.
It's not that people don't care. It's that this is not what the platform is for.
What's important for a platform like that is not even anonymity, but functional pseudonymity.
And that thing is on its way to the effectively outlawed with the push for "age verification".
People do notice it and leave [1], but at some point, there might be no place to go to.
[1] https://www.reddit.com/r/privacy/comments/1rmlzhy/welp_goodb...