by Will Jones, Daily Sceptic:

The claim is now everywhere: we had to lock down because we just didn’t know about this virus. It was all very confusing and we had to play it safe. We had no other option because we just had no clarity about what we were dealing with. The precautionary principle dictated the unprecedented actions.

Actually, the precautionary principle goes both directions. It also dictates that we not enact policies that we know for sure would wreck lives and liberties. They did it anyway, without sufficient knowledge that the measures would achieve any positive good.