one of the problems is, how can a doctor in good conscience continue to renew your prescriptions, if they don't see you and re-evaluate the need?
Maybe they put you on 5MG on amlodipine for your moderately-high blood pressure 18 months ago, but since then you have put on an extra 75lbs and now you have critically high blood pressure - lots of liability if they just keep re-prescribing a low-dose that doesn't match your current conditions.
Everyone wants the easy path to getting the pills they think they need - then there is a bad outcome and some greedy lawyer and client come along and want $10Million in damages for the poor care they got.