It didn't cause billions of people to gain experience in stocking up on supplies, learning how to live while locked down and the problems it entails, and wearin

It didn't cause billions of people to gain experience in stocking up on supplies, learning how to live while locked down and the problems it entails, and wearing masks and taking other precautions. Therefore, it didn't serve as a training pandemic, except maybe for a small group. (It seems it did serve as training for vaccine developers, at least.)