Oh god, I used to identify as a "voluntarist". One of the things that started turning the wheels in my head was talking to a leftist friend of mine from college when we were on a trip, and him asking me how withholding food and water from someone who's literally dying is "voluntary" and "non-aggressive". I hadn't done real hard critique of my worldview until speaking with a socialist who really understood what they were talking about. It didn't take long for me to drift left after that.