I would flip that framing around entirely. If we were clueless, we would not have had a centuries worth of progress of any kind whatsoever, let alone be brought to the point of testing general purpose vaccines, something that would have been unthinkable perhaps even a decade ago.

Electricity is a convenient example, because it's indisputable that we have leveraged it to do real work based on real understanding. I suspect any and every area of knowledge is subject to a kind complexity crash where the combinations of variables outstrip our ability to track them. But treating that like it negates the knowledge we do have is almost literally what it means to miss the forest for the trees.

It does not negate the knowledge that we do have. But we should also acknowledge that certain undertakings are impossible to do safely with the amount of knowledge that we do have.