I think you are correct for normal uni saddles. For real pain free long distance I believe you need to think outside the “normal” box. For a real pain free saddle my noseless air saddle is hard to beat for saddle comport but there are some concessions on the relationship between the saddle and pedals.
For 100% of the weight on the sit bones and no weight on sensitive areas or chafing issues my front support saddle works well. I have put several hundred miles on it with the longest non-stop ride of 26+ miles with no adverse effects.