Yes, it really is that bad, I am disturbed that anyone would believe otherwise.
(If you care about what happens to you when you're sleeping or unconscious, then it is not that difficult to stretch that sense of things to the scenario of being a defenseless vegetable.)
Now, I am not sure what your definition of "vegetable" is, but it certainly varies in scope and severity. All, however, are beyond unpleasant. And in many scenarios, there is no way to be sure-beyond a shadow of a doubt-that the person has no awareness or typical 'feeling'.
It is an absolute disgrace to allow a person to "live" like that. Their lives are far from peaceful, it's a living, breathing HELL with the lowest form of control or autonomy imaginable.
It's a nightmare that have kept many from going through with their method, in fear of ending up in said-vegetative state, maimed, or generally brain damaged enough to no longer be themselves.
Yes, it is humiliating, whether you are conscious of it or not, that fact remains.
As for me, I've already lived enough humiliation for one lifetime.
I barely leave my house, I isolate from people and from being seen by people as it heightens my distress and adds trauma to my existence. The last thing I would want would be to lose that last piece of control, that barely remaining sliver of dignity, to be paraded around at another person's will, to have my own will spat in the face of.
Whenever I think things can't possibly get worse, I am reminded of something like this, of attempts gone wrong or even accidents that leave a person in this situation, or similar.
It is one thing to have people run the narrative when you're dead, it's another thing to have it happen when you're still technically alive.
Anything could happen to what's left of you, anything, you don't get a say any longer, perhaps you can't even move, can't even speak, perhaps your thoughts are no longer your own-if you have any at all-but the world still sees this unanimated corpse as "you".
There is no freedom or respite, picture strangers or maybe even family-awkwardly-wiping your ass every time your body decides to defecate.
You are forever and always at the mercy of others.
There is no privacy, there is no respect, there is no ability to even "be".
From a simple thing like being unable to turn your face from the sun-burning you through the window, to having your limp flesh penetrated by needles, tubes, and maybe even the occasional foreign genitalia (you will make easy pickings for perpetrators).
For any person who finds themselves on this site, who finds fault with life as it is, well, for those people especially, I cannot fathom them shrugging their shoulders to the notion of enduring such an abominable human condition, that should hardly resonate as "human" at all.
What's worse than living? What's worse than dying? This, this horrible in-between that strips someone bare of all faculties, yet keeps them in the public eye...to be pitied and gawked at, to be taken over, to be an ogled shell of a person with nowhere to run to, nowhere to hide, no ability to escape-even to what used to be their mind. The right to die-that too-gone, the right to consent, or to anything at all really, gone.