I think the idea is that Threads can pull in a bunch of users to the federated ecosystem using other instance’s content, implement features exclusive to Threads to entice people to move from whatever instance they’re on now to Threads, and then defederate Threads from everything else afterwards and remove ActivityPub compatibility to trap people on Threads and then enshittify the platform for more money.
The problem is that corporations can scale their own propaganda campaigns way better than we can. It’s best to cut the problem off at the source than it is to try and compete with them at their own game.