Box mentality, and not aware of it is scary.
Like an A and a B for grades seems a huge difference, but for a real evaluation of a person's ability, sometimes it is extremely misleading it could be 90 vs 89.
We do these kinda general categorizing cause it is easy and it helps navigating, like all models are wrong but some are useful.
Refusing to even acknowledge it, is very disgusting and ignorant.
I can't even tell if it is trolling or serious, I just have to not take it seriously.
P.S. obviously there are things that have a clear cut difference even just being an inch away, e.g. whether it should be part of a flood hazard zone, if there is a high cliff, then obviously even on a 2D level it is one inch away, it is still a clear cut off line, but imagine it is relatively flat, and you are further away from the river the flood risk should lower gradually, and again using a box mentality here would be dangerous again.