https://en.m.wikipedia.org/wiki/Markedness

Terms like ‘allistic’ counteract the unmarked norm - we have a special word for ‘autistic’ but we don’t say anything about ‘not autistic’ because it’s ‘normal’ - see how that has a judgmental angle?

It’s hard to examine a thing critically when it’s just called ‘normal,’ if it’s called anything at all. It’s much better to be precise in your speech when you’re addressing such deeply entrenched social practices.

It’s far too easy to slip into the “but this is just normal, why do we even need to think about it, let alone make up a word for it” trap and become complacent.