I didn't find it hard to leave Twitter at all. I will leave Bluesky in a minute if the CEO and Board turn it into a fascist platform. In the meantime, it serves a purpose, and as long as it's useful to me, I'll stay on it.
I find the antagonism to Bluesky by Mastodon users to be a bit puzzling. It's not like Bluesky is "taking away" anything from Mastodon. It's not like Bluesky users are being brainwashed into becoming fascists. Really, give those of us who are on both Bluesky and Mastodon some credit for at least having a little intelligence.
I know the risks, but as I said, right now Bluesky is useful. I can communicate directly with some people--primarily Democrats and civil rights organizations in the U.S.-- who are not on Mastodon now. Some of them even respond, so I know they're aware of what I think. Trying to predict Bluesky's future and allowing a hypothetical future to affect my current status on Bluesky isn't worth arguing about, IMHO.