Good luck helping somebody paralyzed from the neck down live a fulfilling life.
Honestly, you seem to suffer from a lack of imagination. There are famous examples of people profoundly paralyzed who most likely lived fulfilling lives (e.g. Stephen Hawking), and I believe there's research the people's happiness tends to return to baseline after both very good and very bad events.
I think you're mistaken, I didn't trivialize anything.
If anything's being trivialized, it was the value of quadriplegic people, who some internet rando blithely declared as all being incapable of having a "fulfilling life."
[1] https://www.termedia.pl/Quality-of-life-in-patients-with-tet...