No, it doesn't work.

The problem is not the fact that they scan and (correctly) ignore a vast bulk of material. It's a question of what false positives it hits, and how important those false positives are.

So far we've had two high profile false positives one of which is directly relevant to American civic life.

At some point if your errors are high profile enough, or damaging enough, it's irrelevant how few errors you're making, damage is being done.

This is a problem, and it needs to be dealt with.