Is it healthy to get into a near death experience just to get something done?

Why is it "bad" to be in a lethargic state?

Have you ever asked yourself these questions?

I wouldn't characterize it as a near death experience but an activation of the mammalian dive reflex. It's a pretty profound physiological set of changes that most people have never experienced, oddly.

You don't get near death experiences just by holding breath, not even close. You might eventually be able to make yourself pass out though, so never ever practice long breath hold under circumstances where a loss of consciousness would be a danger, e.g., while driving, close or in water, close to streets or high drops or stairs, etc.

Lethargic states stop you from doing what you want to do and to manage your time effectively. Allocate time being in such states for resting or sleeping hours.

What makes you say that breath holding for diving is a "near death experience"? It's pretty safe from what I can see?