This is one type of connection that would be unlikely to form if superficial anonymity is lost. That kid probably would be off in some "safe" walled garden.
This doesn't even touch on more obvious forms of discrimination like gender, religion, etc.
And political affiliation / speech isn't protected in the US, so an employer could term you anytime for policy disagreement. Such a policy would destroy the exploration of ideas overnight, as outrage mobs would try to get any dissident sacked.
The technical barriers to entry to that early internet effectively made it a "safe walled garden" for nerdy types.
Repeating that experiment now - meeting up with anonymous posters from a given platform - I'm sure would have very different results.
While the EU wastes their time with things like this, they fall further and further behind the curve, still wondering why no one wants to start a business there.