Any service looking to replace human writers with ai is positioning itself for failure once generative ai becomes more mainstream. Once your average Joe can ask a native phone app for anything they want, the Only value of written text will be the human element.
Just an fyi, defederation doesn’t mean you as a user can’t see any content from a given instance or vice versa. It’s more like from the time of defederation, users on the other Lemmy can’t be seen commenting or posting on your Lemmy. I believe there are other consequences too, but it’s not as straightforward as a ban.
Defederation is a feature, not a bug. Lemmy was designed with the idea that instances could be more specific in thier content, so for your lemmy to defederate from a Ukraine war footage instance might not be a condemnation, so much as a curation decision.
Think of it like, an instance has the potential to be either a reddit alternative or a collection of related subreddits.