@Purplelibraryguy, if you're referring to hedonic adaptation, I'm afraid to let you know that that's pretty much a myth. See
this blog post (scroll down to the "Hedonic Adaptation & Happiness" section) for more details. Or you can read the abstract of
the paper that deals directly with people that suffered disabilities, following almost a thousand people for multiple years before and after their disabilities.
This isn't to say that people without disabilities don't have a right to life and all that other stuff that you and
@ShayGuy were arguing; I entirely agree with you both on that. It's just that that specific claim, that massive negative or positive life events don't actually matter to long-term happiness, is false, and shouldn't be spread. It's not "wrong" for disabled people to actually be less happy after becoming disabled; it's entirely normal and unfortunate, and they shouldn't feel any compulsion by others to just shrug it off or have the difficulties of their situation trivialized by thinking that they'll just adapt to the circumstances.
Have a good day!