It’s not the “being loved and adored” that’s the problem here, it’s hurting others.
If someone is completely despicable and plans to off themselves in a manner that causes distress to others that’s just as objectionable.
It’s not a matter of “loving and adoring” the young man who committed suicide via that Amtrak I was on that pisses me off, it’s the mental anguish he caused the train driver, the inconvenience to the rest of us, the worry of my parents when I was 6 hours overdue (this was before cell phones, so I had no way to call them and tell them I was OK even if there had been a train accident), the horror of the conductor who trekked back down the tracks to confirm that we had, indeed, hit someone, the reactions of the first responders who showed up and had to shovel body parts into bags, the guy who had to hose the gore off the train and the tracks…
Well, yes, presumably his family and friends were even more horrified, disgusted, upset, etc. than we on the train were, but this asshat didn’t just hurt his loved ones, he perpetrated emotional pain on a lot of total strangers, too. That is also wrong. It would have been wrong even if he was unloved, unwanted, and unlikeable.
It’s not a matter of being “sentenced to live”, it’s a matter of not hurting other people. If that young man had swallowed pills or even just blew his head off with a shotgun his suicide would have been less painful and affected fewer people.
You have to be extremely isolated such that your death isn’t going to distress/create pain for other people. Now, again, I’m not being absolutist here - intractable, agonizing pain that cannot be relieved in someone ill might outweigh the pain caused to others by ending the patient’s pain - but that has to be a LOT of pain, with no hope of recovery, to justify ending it all from my viewpoint.