The question is simultaneously too broad and too narrow. Technical skills, by definition, are specific to a profession/task/situation, thus they won’t benefit the vast majority of people.

If you are “optimising for positive impact and transformation”, the number one ability you should upload to every person’s brain is empathy.

Actually reading the error message

Ahh, interesting… what skill would I want to fundamentally, absolutely, and forever, devalue to absolute zero future economic value, while simultaneously maximizing positive societal impact and transformation? Allowing everyone to do skillfully what no one would ever again be willing to pay for?

I don’t suppose advertising is considered a technical skill? Or whatever a CEO actually does?