Quite the opposite, the mouse in sbp is probably the most precise aiming method you can use, especially when tracking moving targets. It'S mopre precise and reacts faster. Many players favour it over a stick. I only use a HOTAS combo for it alows me to have almost all controls within the grasp of my hands. For gunnery, I grab the mouse.
Try it. It'S closer to how the real thing works. And it works better.
SBP is one of those rare sims were you can claim with all honesty that a stick is not needed.