The market is built on lots of small actors doing local, short-term optimizations. So let's say you're a supplier, and you come up with a disciplined, honest estimate of a buffer you need in your supply chain to cope with the next epidemic. This raises your costs, and as a buyer who cares primarily about next quarter's report sheets, I'll go with your competitor who doesn't include any safety margin, because they'll be cheaper. Will this land me into trouble in a few years? Probably, but that's out of scope of quarterly reporting, and thus not my problem.

Ultimately, the society is enslaved to the aggregate market pressures. We won't fix things until we can figure out how to build safety margins into the market and make them stick.