I think the article points at the correct root cause of most of this - “overthinking”.
It isn’t just the overanalysis of day to day occurrences, the worrying about tangibles and the ratifying possibilities of every decision, the playing out of realistic hypotheticals - there are vast categories of intangibles to mull over which will really get you down if you consider them deeply enough.
Most hyper-intelligent people I know are more or less consumed by existential dread. Some cope better than others - and that’s usually environmental.
I found building a business ultimately unfulfilling, as no matter what success we found, it all just felt like so much artifice, sand castles in a playpit - and in the meantime I’d worry about the collapse of civilisation (my god, it’s a razor’s edge we blunder blithely along), the insignificance of all human existence in an immense and dispassionate universe, whether anything is even real, anyway, and then, what does real even mean. Down the miserable fucking rabbit hole you go.
A change of scene was good. I dig holes, build things, cut and plant trees, sow seeds, and while the dread is still most definitely there, it’s bearable with a more direct connection to the here and now, the simplicity and challenges of the changing seasons, of just surviving in nature. Oh, and appreciating just how little control I actually have over my environment - my decisions don’t mean shit more often than not, as nature usually has other ideas, and a coin toss is just as good.
Which makes me wonder if perhaps the problem isn’t intelligence itself, but what the intelligent choose to do with it - typically some highly abstracted field, where it’s easy to feel disconnected from everything, and where the decisions to be made are complex and deeply interconnected in their inputs and outputs.
It’d be interesting to slice the Mensa survey by profession. It might be stronger than the IQ correlation.