Comment by jmward01

I can agree that good enough is not tied to cost and that is likely unfortunate for the patient. It is instead tied to profit, for the company. If increasing the standard of care leads to more profit a rational company will do that. If it means lowering then they will do that. Unfortunately there aren't many actual direct ties between patient outcome and profit and often when they do exist they are negative for the patient. The classic example of this is the question of is it more profitable to cure or to manage a disease? I'd love it if whole life outcome was actually tied to profit in a way that was beneficial to the patient. That would mean a free market driven by the patient as the consumer could exist. But healthcare systems, especially in the US, generally aren't structured that way.

So, to answer your question about 'why do we get improved, costlier insulin if the old thing was good enough' it is because the healthcare system will make more money on it. If they take a % then they are incentivized to use a more expensive version and they can justify it with the word 'better' even if the person is actually worse off as their financial situation deteriorates and they and their families are forced to cut quality of life everywhere else. They put their line for good enough at the point that makes the most value for them, not the point that is best for the patient.