I'm inclined to agree with your proposal, but I wonder if there are supplementary community norms that, if made explicit, might make it easier to venture into confusing and polarizing topics without losing LW's usual level of accuracy and of signal to noise. (I assume fear of filling the blog with nonsense, and thereby losing some good readers/commenters, is much of what currently keeps e.g. political discussion off of LW.)

Maybe it would help to have heuristics such as "if you don't have anything clear and obviously correct to say, don't say anything at all", that could be reiterated and enforced when tricky topics come up.