A good landing will normally start with the approach stable by at least 3 or 400 feet. If a student has more practice from an early stage at keeping an aircraft stable on approach until 40 or 50ft, then when they move onto landing, they will find them easier, as they are used to flying the approach already.
I dont see any reason why a student shouldnt fly an approach, until 40-50ft as soon as they are able to control pitch roll and power, which should be after a couple of hours.
NB