Oh, you can get banned here. It's not like this is like a place of free speech. It's just that the internet is kind of created little pockets of echo chambers. It is what it is. And like it was always going to be like that anyways. I just like it that it's not monetized by corporations that are bombing the shit out of children.
The idea behind lemmy (and every other decentralized platform) is not that you can't get banned. The idea is that f the mods of one instance decde to go crazy, are bought by malicious people, or if there is an hostile takover (like what happened to freenode), then the network isn't compromized, and ideally there are plenty of other instances with a moderation policy you agree with and where you can recreate an account
only place I've ever been banned from here was not paying attention to which "channel" I was in since I dont fully understand how Lemmy works, and I ended up posting a comment to a thread I saw come up on the main page of lemmy.world when it was actually a lemmy .ml link, and people over there, most of them dont take too kindly to you insulting their Russian overlords,
.ml by and large are too ignorant to recognize the Russians aren't their Socialist idols, they're just a Capitalist oligarchic mafia state. So you make one comment that is percieved as being targetting against the Putin regime and you're automatically assigned the label of a Pro Western NATOpill schill
Only by the admin of your home instance, which is unlikely and normally comes after something very extreme (and can be mitigated by running your own instance, where you are in sole power over your account, so it cannot be banned globally)
But normally, you'll get banned by the community/certain other instance in very gruesome cases, but not your account.