or even just taking cholesterol medicine, or having skin melanoma removed. I doubt many doctors are thinking "whelp, I have high cholesterol, guess it's my time to die"

That doesn't have much to do with him using non-free computer systems though.

As a side note: the pendulum is swinging the other way in regards to cholesterol - so in many cases doctors are not actually concerned about high cholesterol in the same way they used to be.

Oh yeah that is a little more complicated. I'd still imagine that he might choose death, I suppose that will be a real test to his ideology if it ever occurs.