Someone should have stuck that in a guide or something. I think I would have found it useful to know back when I climbed on grit quite a lot... Now you say it it does make some sense, but if you started climbing somewhere without many micro routes it's not obvious. I'm also not entirely sure that's how it's used round the country? I don't recall micro routes in Avon feeling like they used that system, but maybe I'm misremembering.
I think you're projecting or imagining when it comes to people throwing a fit about these grades. I recall people just treating them like a joke, because that's how they seem if you're used to normal grading