So all things considered, I don't think we can really say that we've proved out that the stuff we've been up to since the dawn of agriculture (10k years ago) is going to stand the test of time. Maybe let's at least see where global warming goes over the next 100-200 years before we start throwing around words like "thrive".
Ok but could they follow 500 influencers, watch people die everyday, get the ever up to date flow of new disease, earthquakes, terrorists attack fed 24/7, compare themselves to the best of the best, see the worst of the worst, &c. ?
For people who lived/grew up before the 90s/2000s it is very obvious that things changed in a massive way extremely quickly, a lot due to internet but eve more due to pocket computers.
I think you're massively underestimating the scale of the issue. People don't thrive on social medias interactions, they're addicted to them, depending on the survey/study you look at it's anywhere from 4 to 9 hours per day on average.
Maybe not every day, but death was a lot closer to people for everything up to the last hundred years or so.
Look at child and maternal death rates.
Not a slew of garbage about 10000 tragic events happening each day.
I believe people have in fact been routinely living in groups of far more than 30 people for tens of thousands of years (in some but not all places/times over that span, sure), it's a misconception to think this is new or unusual for humans.
We have not only done fine with it, we have thrived with it.
(Also having relationships over distance too, for a long long time).