I am new and trying to understand how Lemmy works. I am posting this from my lemmy.world account, on a lemmy.ml community. It seems like you can read, post, subscribe to whatever community outside of the instance you’re registered with. So… Why register on lemmy.world vs lemmy.ml or any other instance, if all communities are accessible to everyone?
Trust in admin(s).
You’re trusting the person running your instance to do a good job, to provide good hardware and keep it running, to ensure it isn’t de-federated from other instances, to provide Lemmy software updates, to not ban you or vanish one day.
Really, I don’t know who my admins are, I’ve read a few posts and they seem pretty good, but I’ve not seen them before. But really, this is what it will come down to in the long run.