Technically it is, as someone else mentioned, text is copied on federation, this means is you as an admin need to actively moderate instances you federate with that may cause you issues in a legal standpoint whether correct or not. Facebook etc have rights that means you’re not liable for user content, you as an individual instance admin however would need to fight for those rights.
Sure it’s a rubbish thing they did but I also understand it completely.
Importantly and how it’s different to FF is that it boots the content without calling the disk reset and if you keep the disk button wedged then that reset never triggers, so that copy protection isn’t called, where as FF basically triggers a drive reset which is why you couldn’t use that.