I don't disagree, but if it takes off there's going to be a selective pressure on instances to engage with meta's activitypub stuff and that's going to let meta scrape data. I think that being able to engage with a wide variety of users, especially on platforms like mastodon or other similar offerings, is going to be a good thing, but the protocol needs implicit ways to protect its users outside of just blocking out other instances, whatever that looks like, so that decentralization can be granular and not just "how much do you want to give your data to meta"