I did not vote because I think none of the above. In theory, ideally, yes, let him go home. But practically, not everyone can have every wish they want, even their last dying wish. So number 1 is out.
Number 2 is wrong because he does have a right to fly, but to fly himself in his own plane, given he passes certification. There is no right to force a private company to pilot you around in a commercial craft.
3. "just"... nope. No "justice" here, this was a liability call - the pilot and the company were covering their own butts. That has nothing to do with being just or righteous.
4. No, the airline wasn't being an ass. As long as our system allows them to be ruined by a frivolous lawsuit because some other passenger had to sit next to a body for a couple hours, airlines will be forced to "be an ass" in ways like this.
The right answer here is.... how the hell do airlines know about your personal state of health? Don't signal to them you're any sicker than you are. They fly people in wheelchairs all the time. The man should not have taken his medication before boarding, so that he looked half comatose, but should have remained alert until after takeoff. He obviously looked like he should have been in an ambulance instead of pushed around by his wife; so the pilot's decision is not surprising. I dock the man points for not knowing how to play the game.
If going home means that much to him, and to his family, they will pull together the funds to hire some small private jet to take him. I'm sure there is someone who'll do it. He has a right to "pursue" happiness, let him pursue it; that right comes with no guarantee that he'll achieve it.