I don't think it would have made a shit anyway since Doffy's strings can control people against their will so why couldn't they do it to an unconscious person?
I thought Bellamy wanted Luffy to just KO him? He didn't want to fight Luffy or even Dodo by then. No?
He respected him I guess because he still considered Dodo to be a great pirate and more importantly looked up to him since his youth so respected him for inspiring him.