As much as I would love to complain about the healthcare systems, this looks more like some condition that he had for a month or two and didn't appreciate the severity. Based on the fact he complained about the cost, but never brought up not being able to afford it, its unknown if he didn't seek treatment earlier because he didn't know that he needed to, or that he couldn't afford it. Biopsies and specialists take time unless you are actively dying, and when he was seeking treatment, that did not seem to be the case. This is true anywhere. Unfortunately he ran out of time, ~~pneumonia~~ Lung issues ~~is~~ are no joke and there isn't really anything you can do about it until you know whats causing it, even then, sometimes there is nothing that can be done. There is another discussion at !chat@yiffit.net

Edit: made an edit above, additional thoughts below
I will put suffocating because of coughing towards the top of the list of horrible ways to die.
Looking back through posts, I still don't know if he didn't seek help months ago because of cost or need. If it was cost, that sucks. I'm not a doctor, but looking into the two options presented, neither had a positive outlook. Based on posts indicating long covid and a recurrence of shingles, I will put him in the immunocompromised category. Whether cancer or fungus, prognosis on both is poor.
Is the healthcare system in the US too expensive, yes, no question. Its full of perverse profit incentives at every level and inelastic demand with near monopolistic supply. Did it make a difference here, I don't know, but I don't think it forms the basis for a compelling argument or complaint. If the biopsy came back and he couldn't afford treatment, this would be different.

His life ended in an unpleasant way I would not wish on anybody. May his contributions not be forgotten.