Making design decisions in the present which guard against the future is one of the most important things we can do. It is one of the most important reasons to choose FOSS licenses, for instance, which provide an exit plan and also counterbalance against temptation to enshittify a project.
To this end, Bluesky's goals of "credible exit" are actually very important. It creates a similar pressure for the organization itself to stay true as long as it can, even acknowledging the organization as a future adversary, and actually preparing for it.
I am pro-Bluesky-credible-exit.