Are those people also making posts like "I'd rather get shot by Mao than use Instagram Threads/Reels" right now?

That's true, but proportionally they're a vast minority.

The algorithm segregates based on physical features, which can make sure they don't see one another with frequency.

It's known to use facial recognition to boost videos of "beautiful people".

https://www.dexerto.com/tiktok/tiktoks-algorithm-prioritizes...