That is a very good point. It seems like his argument is that, since we have no free will, we should stop trying to do anything to control others' actions... which in itself is suggesting to control others' actions. Furthermore regardless of whether we have free will or not, however you want to define it- punishing bad behavior discourages it and provides better outcomes for the world at large. It's like he's saying people just blindly act according to some non-free-will principle without taking in any environmental input, which just seems ridiculous. And implying that specifically applies only to bad behavior, which just seems like he's being smugly pessimistic as a gotcha. "Ha ha, the world is bad, if you disagree with me you're just a hopeless optimist" sort of thing.