I do not like to hang out with A-B paradigm stuck people. But i do encounter a lot of them in real life. Many more in online forums.

Here is one that is weird:
Flat earthers vs Ball earthers.
If you do not agree with everything a Ball earthers says, you are instantly a Flat earther. There is no nuance.

If you do not agree with everything a flat earther says, you are often accused of being a Ball earther, but you can usually talk to them about alternative views.

I am neither a Ball earther or a Flat earther. And so, it is difficult to discuss anything.

This A-B thing is taught in school early.
Everything is truly a True-False test.

Many people, even in that field of study, do not know of any C's. So, they are not only stuck in the A-B paradigm, but also do not know that they are ignoring C. They are ignorant of its existence.

The reason i know, have experiences with so much A-B in real life is i know a LOT of C's.
And so, even those people who can see some C's, revert back to A-B in other areas.