If it can be seen it can be copied, yes, but there's a world of difference between someone scraping a service, and that service using your raw data via the back end along with all the additional metadata and account data that's associated with it.
FWIW, there's been a mass exodus of artists and creative types from X/Twitter over to Bsky lately, along with their followers, causing their numbers to grow quickly from the 6 digits over a million and now into the tens of millions in just a few short months, and I don't think they're far enough down the path of enshitification to betray the trust of that userbase just yet. I'm not saying it won't happen, but this early in the game it will quickly kill that momentum if it's discovered that they have.