“I am sure Hashem has enough kidneys in his bank account for me.”
Tell that to the scores of Yidden who have been anxiously waiting for many months and longer for a compatible kidney donor. Time is running out for them.
What is that supposed to mean?
Hashem also has enough ability to heal them outright, and doesn’t do so.
My point was that if we aren’t suppose to donate organs, then we can safely assume that Hashem isn’t going to cause more of us to die for that. We can safely assume Hashem runs the world and can make those who He wants to live, live; and those who He wants to die, die; regardless of whether we decide to donate organs.