I don't agree.
Most mice are more responsive and more accurate than most sticks, but a good stick is not far off, and there is a lot more to flight/combat than just those two rotational axes.
M+kb allows you to indicate where you want to end up pointing, with a HOTAS you have to continuously estimate where you will end up pointing. There is no way you can catch up to that advantage with a HOTAS if we assume comparable skill level with the controllers. Direction is the single most important aspect of regular flight / combat.
Now I think HOTAS is a better and more enjoyable way to play the game, but that is a different discussion.