There is no reason for a bot to be able to access or post on federated social networks if the goal is to make social media humane.
For this reason, bots should be heavily disallowed from posting content to or accessing content from federated social media.
Well good news then, that’s not the goal and there isn’t really a single goal beyond decentralization and interoperability. Neither of which bots affect.
If you want an instance without bots you can find one or start your own.