Every single manufacturer in the US stated plainly that they did not feel safe scaling up production, because the demand was always going to be temporary, and they didn't want to be left with unusable factories.
A competent admin could have worked with them to arrange for financial help to temporarily expand and not leave them hanging.
That's what happens when "The free market is the only one allowed to make resource distribution choices" hits reality. Sometimes all rational actors making rational choices will leave you fucked.
Ethanol did not have that fear, as the infrastructure for it shares a lot with other industries, and we scaled that production quickly.
It's just more examples of, again, the way the free market will respond to changes in demand is not always a good thing, and sometimes you do have to nudge the market or buoy producers to keep things running well and quickly respond.
The admin could also have, you know, not stolen the critical stockpile of PPE, given it to a business spun up by his family, and let them sell it for personal profit.