your right, but I think the general sense of Toriyama just changing things around in the franchise whether canon or not is what you can get the point from the guys post.I'm not saying he's never retconned stuff period, I'm saying he didn't retcon Broly because there's nothing to retcon to begin with
maybe retcon king is not the appropriate word for now, but he is def someone who changes it up to fit the narrative that works for him and the franchise at that moment