And he is trained, but if my reply had been "I can control him because he is trained to come, sit, down, stay, come to my side and press his nose to my palm, and settle on command," posters would have accepted that or would they have insisted that one day his training will fail and he will eat me?
The harness and head collar are secondary tools to his training and are there as a "just in case" rather than something I put all of my faith into or rely on fully. He does pull on his lead, so the head collar helps with that.
I could train him to not pull, but a) it doesn't bother me, and b) he will come to my side and put his nose to my palm when I need him under close control, such as when we are passing a child, so I don't feel like resolving the pulling is a massive priority. I'd prefer to spend time playing scent games with him and teaching him useful things like putting his toys away and closing doors after he opens them. I might get around to teaching him heel one day, I might not.