I think that a discussion in which only most people are mindkilled can still be a fairly productive one on these questions in the LW format. LW is actually one of the few places where you would get some people who aren’t mindkilled, so I think it is actually good that it achieves this much.
They seem fairly ancillary tor LW as a place for improving instrumental or epistemic rationality, though. If you think testing the extreme cases of your models of your own decision-making is likely to result in practical improvements in your thinking, or just want to test yourself on difficult questions, these things seem like they might be a bit helpful, but I’m comfortable with them being censored as a side effect of a policy with useful effects.
I think in this context, “asking about” might include raising for neutral discussion without drawing moral judgements.
The connection I see between them is that if someone starts neutral discussion about a possible action, actions which would reasonably be classified as advocacy have to be permitted if the discussion is going to progress smoothly. We can’t discuss whether some action is good or bad without letting people put forward arguments that it is good.