Joseph, the argument could be made that those positions are not a move to the left, but rather a move to a more libertarian understanding of the role of government in citizen’s lives. Libertarian does not mean liberal, but it does mean that the state doesn’t regulate relationships or identity or religion or personal conscience. It stays out of citizens personal lives as much as possible.
That is not a left wing perspective. In fact, most of the most radical right wing elements of the US have a strong libertarian bent.