I thought it was a bit muddy in places. More unclear than I'd expect as to the truth claims of differernt worldviews.
On abortion, for example, it seems to be saying that because the claims of having a soul or personhood of an unborn human are what it describes as "metaphysical" they are unprovable, and therefore we don't legally enforce them on others.
But we could quite easily make the same kind of argument about the morality of eugenically euthanizing the intellectually disabled, or the death penalty, or murder, theft, or any other number of moral questions and rights of those defined as persons under the law. It's not self evident that any born human is a person any more than a fetal human. And people have not always believed that all were, it was an argument that had to be made and would certainly fall under what this guy is calling a metaphysical belief.