I have a sister who likes to use the “is that hurting you argument?” Well then, some Islamist on the other side of the world inflicting genital mutilation or hanging homosexuals does not hurt me directly either. Should I support those two actions? According to liberal “logic” I should.
Sure, but neither that argument, or the “no legislating morality” argument that the author addresses, are actually the argument that has won over the majority of the public to socially liberal positions.
I don’t think we should be getting distracted by these basically irrelevant arguments, just because they are easy to pick apart. The real argument that has been winning the day is: “what happens between two consenting adults, as long as nobody is harmed, is nobody else’s business”. That’s the actual argument we need to focus on.