I think that's a valid arguement. Well.....(thinking)......even if lets say you have a mild loss and you wear hearing aids, but you have a normal cochlear. The hearing loss may not be progressive. Or if so the hearing loss might not decrease quickly and ha are still a benefit. Also my opinion is surgery should be the last option not the first.
CIs are a lot of work, the mapping, training, listening. Its not for everyone and its only a device a tool. But if it is on your mind - discuss it with your doctor. Not all doctors are out to just do the surgery, most want what is best for the patient.
