Why is the deathbed perspective considered so valuable?

Why is the deathbed perspective considered so valuable?
aeon.co

Your last words likely won't be wise, witty, or even coherent.

A good account from a medical professional on what the end stage of life actually looks like can be found here:

https://slatestarcodex.com/2013/07/17/who-by-very-slow-decay...

I was particularly struck by the following comment from one of the readers:

""" My grandmother has dementia to the point that she yells and moans the same thing non stop 24 hours a day, including the phrase, “please help me”. This is continuous except for 15 minute patches of sleep here and there as she no longer really sleeps just dozes. She weighs 90 lbs if that and is eggshell fragile screaming when touched due to degenerative muscle tears compounded by arthritis. Her bowels no longer work and she fluctuates between constipation, where the assistants administer a suppository, or she has explosive diarrhea that must be cleaned up which requires moving her excessively and thus more screaming and claims of pain. She is on peritoneal dialysis and has congestive heart failure with a pace maker, prior to loosing all capacities a few months back she was swallowing nitroglycerin like candy and up until she stopped walking entirely my mom was dragging her to doctors and what not. Even then moving was difficult and required wheelchairs and walkers. Her dialysis port is always sore and semi infected despite meticulous hygiene.

She has a raging UTI on a twice monthly basis though she is bathed by attendants and her diaper and garments changed regularly. She is on oxygen though she does not even move about to use oxygen as she can no longer stand nor even muster the strength to hold a sippy cup. She has forgotten how to eat or even swallow and still she is forced to choke down at least 15 pills per day and takes the occasional bite if food which she may stop chewing and allow to fall from her mouth. Her mouth is so dry the pills do not even dissolve when they lodge so she has to be coaxed and coaxed endlessly and given water in a dropper. She has round the clock private care to the tune of a few thousand per month. I had rather this money go to medical research or a non profit hospital. This team also includes a physical therapist which is useless. She is always freezing and has to be by a fireplace or heater or covered in layers of heated blankets so comfort is hard to achieve.

She is moved around like a doll with much ado and her screaming in pain which my mom would claim was from her dementia and not so much pain. Finally after months of this torture on her poor failing little body my mother is now considering hospice care mainly due to the cocktail of pain killers and anti anxiety pills no longer soothe her at all-I really have no clue why it has not stopped her heart. It has been surreal to witness this and I feel so bad for people who do not have the resources or loved ones for even this much relief if relief is what you call it. However I think my grandmother would have never considered euthanasia or absence of life saving measures if given a choice while she was cogent because she had an unhealthy fear of death even then.

The way we view death is really twisted and I fault religious nonsense with a lot of that phobia. Modern medicine, while mostly positive, can be grotesque because it can extend life past a semblance of life. I personally have had a living will made since this despite being young and can only hope we make strides in having physician assisted suicide legalized so people have options. """