That's not the point. It being done in a local shop for a few bucks with no small letter text saying that "we may break your screen in half because this thing can't be repaired properly". It mentions that it should not use glue, not need solvent and only commercially available tools may be usable (or they have to be provided next to the phone).

Also availability of original spare parts is important. Aftermarket batteries often tend to be shitty.