I'm well familiar with the expression. However it's not helpful to someone who isn't already familiar. It's another form of "you're doing it wrong" without explanation.

It's an intellectual teaser. You read it and think to yourself, "well this can't possibly be true, let me look into this further". Then you learn.

Do you expect people to "look into it further" with everything they think cannot be true? I would not.

If they have any interest in the topic in the first place? Of course.

I certainly did, so many years ago...

It also serves to separate the curious from the non-curious. Getting everything wrong is a fact of life and can happen to anyone.