There seems to be surprisingly little argumentation in favor of this convergence

It appears here from time to time. It tends to be considered a trivial error. (This is unlikely to change.)

I suppose it is unlikely to change, but the level of agreement is completely unreflective of any superior understanding or insight. What is rejected, over and over, is a straw-man version of ethical objectivism. And while lesswrongers are informed by their leaders that academic philosophy is dangerous mind-rot, that is unlikely to change.