If everyone's got the plague does that mean they're all in tip top health? Nope. Festering, bulbous pustules are what they are, and don't magically transform by force of numbers.

The same goes for the tendency to mechanically pigeonhole others - it is what it is, a mania for rigidly organizing the (supposedly) rigidly organizing. It sees its own whimsical image in the mirror and explodes with delight.

That's a naked (and unconvincing) appeal to total-relativism.