The two lines that caught my eye:
". . . despite my MS, my existence has never been richer, surrounded by a loving family and friends."
"Assisted suicide would create a climate of fatalism, a loss of hope. It is [a] sickening world where individual life is devalued and where only the fittest are regarded as contributors of society."
I think we already do live in that world. A glance at the economy, at most social events, at popular entertainment is enough to prove that point.
How do we make it less sickening?