The one cause that I’d champion over all others is the right to have access to assisted suicide.
It’s really a travesty how we tend to hide just how grisly dying (and in some cases living) can be, and how those who most go through it inherently lose their voices to advocate for others not suffering the same drawn out fate.
I’m sorry you had to watch as it dragged out.
My SO is a doctor and the cases that most upset them are not the healthy patients that die, but helplessly watching the unhealthy patients that are forced to drag on living because of various factors.
We’re getting much better at unnaturally prolonging life, and while that’s a good thing in some cases where it can change outcomes for the better, there’s a very dark side of it as well that’s gradually getting worse.
Know that it’s not a topic that only you are thinking about, even if it’s unfortunately a topic that is too rarely discussed in public.