You only need one engine stoppage on approach to teach the value of holding on to height until you absolutely have to get rid of it to land so I'm in favour of learning high sink rate manoeuvres and I squirm when I see singles being dragged in on 3 degree glide slopes (a misnomer if ever there was one). I fly a single and acknowledge that multi engine types may well be different.
Do you only ever fly from A to B if there is a runway beneath you? or do engine failures only ever occur on final approach? Might not repeated cooling engine damage as a result of making every approach a glide approach, end up giving you the very engine failure, the consequences of which you are trying to avoid? or do you in fact allow for the consequences of possible engine damage by keeping some power on? in which case you are still going to land short if it all goes quiet up front.
When one has paid for a new turbo charged engine due to poor engine temperature management, one takes a different view on these things.