Not exactly. I’ve usually heard it explained as “quantifiable” vs not. If you can attach a number, it’s “fewer”, otherwise it’s “less”.

e.g. less money, fewer dollars

Same reason flapping your arms really fast will never make you start flying. You don’t have the equipment. You can’t fly because that’s not what arms do.

Then you have to either assume it’s accurate which is a damn bold assumption, or you have to read through it yourself to know anyway.