Nuance is not a popular thing in the US in recent decades. The false dichotomy appears to be more than our collective favorite logical fallacy, but some people’s favorite avocation.
I blame the media, as well as people. People's "news" have been reduced to headlines or 30 second clips on tiktok/insta. Of course they won't convey nuance.
And of course content creators / news aggregators know this so they purposely strip all nuance out of their reporting.