I believe that the important lesson is that when government steps back, people will resort to ingrained behaviors, and "stock up when a crisis begins" is one of those. The wrong answer to that is to limit the amount anyone can buy, because you're just increasing the crisis-feel. The right answer is to make sure that people calm down, and the easiest way to do that is to demonstrate that the supply of goods is not affected. You do that by adding a fleet of trucks to transport goods to super markets and add a temporary night shift to re-stock shelves. If people see that there is no shortage, they will calm down.

The opposite is happening, you have (local, temporary) shortages and some politician who hasn't bought their own groceries in the last decade says "I assure you, there are no shortages", while everybody sees the empty shelves on a daily basis.

Bit like the ban effect, like many a record seen sales increase down to the aspect that some radio or other avenue deemed to ban the record.

Equally, once many heard news of something was being brought up, the net effect was to drive others into panic and drive them to do the same.

Panic begats panic. So you start to enter into the aspect of https://en.wikipedia.org/wiki/Crowd_psychology