> Being forced to interact with people you haven't chosen to socialize is good for your mental health and for society.

That may well be true for some extroverted people, yes; it is 100% absolutely not true for "all people". You force me to interact with people I haven't chosen and there's a reasonably high probability that I'll subsequently choose to never interact with you again.[0]

> People interacting with different people are less afraid of the world, more trusting etc.

My childhood was largely interaction with people I didn't choose[1] and, nope, I am absolutely not "more trusting" as a result.

> Clustering into echochambers is bad for society as a whole.

Citation needed for that one.

[0] There is a slim chance that the people I haven't chosen to interact with turn out to be reasonable decent people who I don't annoy and, more importantly, don't annoy me.

[1] A bunch of enforced house moves and a paucity of decent locals at each new house/school.