1) claims that morality isn't arbitrary and we can make definitive statements about it
2) Also claims no universally compelling arguments.
Both these statements are also true about physics, yet nobody seems to be confused about it in that case.
What do you mean? Rational agents aught to converge upon what physics is.
There seems to be a widespread impression that the metaethics sequence was not very successful as an explanation of Eliezer Yudkowsky's views. It even says so on the wiki. And frankly, I'm puzzled by this... hence the "apparently" in this post's title. When I read the metaethics sequence, it seemed to make perfect sense to me. I can think of a couple things that may have made me different from the average OB/LW reader in this regard: