as others have pointed out, the defualt photos app is designed to do the best for the average user.

If you want control of every feature and no post processing then download a different photo app like https://apps.apple.com/us/app/halide-mark-ii-pro-camera/id88...

This to me is no different than the popular digital cameras vs the pro cameras. The built in app is targeting the masses. it can never make every choice perfectly and further it doesn't need to please everyone. That's the entire point of having apps