It’s still an action thousands of people need to take just to undo the harm of one bot,

No, it’s an action that an instance admin can take quite easily.

Please run these bots in instances which are not federating their content to the fediverse.

No. That completely destroys the intent of having a tool that is meant to bootstrap communities.

More spam bots / spam instances are added to the network, which is bad.

You and I seem to have very different ideas of what is “spam”. We have bots like @L4s@lemmy.world that take RSS feeds from tech sites and post them to relevant communities and they seem to be well received. The posts are interesting get upvoted, the ones that are not get downvoted. Do you think that these bots should be considered “spammers”?

Let’s leave at this: if you ever see any flood of content coming from alien.top, then I’ll have no qualms in revising the policies and making adjustments to the system. But for now your arguments are inching closer and closer to concern trolling.