From Beehaws docs on defederation:
We are simple with defederating: we do not allow hate speech, and we must consider our own limits when it comes to moderating. If an instance allows hateful speech or in our judgement has users who are too much for us to currently manage given the state of Lemmy, we defederate with it.
If the goal is to limit hate speech and provide a safe space on Beehaw, then I think you should defederate from the fediverse. I think however the value in providing a safe(r) platform for engaging with the rest of the fediverse to be more valuable, but I am personally in no need of such a safe space myself.