I don't understand the point you are trying to make. On the one hand, you say:
Defederating entire instances does not stop bad actors, but an active strongwilled community does.
This makes me think you are saying not to defederate because it would be better to call out bad behavior - interact with the bad actors and point out their falsehoods, hate, etc. But on the other hand, you say:
I don’t interact with them. I don’t provide them with any value.
and
It’s not our responsibility to moderate other instances.
These make me think you are saying just ignore them. And if we're going to just ignore them, how is that different from the perspective of the bad actors, from defederating? How does not moderating and not interacting stop bad actors?
This is all new to me, I don't know the best use of defederating, but I didn't follow the argument you were making.