Earlier quoted context omitted.
Why are you teaching people at all? If you hire professionals they either know what you need already, or you tell them "We use X. Go and learn X." There are remote-only outfits, and they do fine - at least as well "We're not getting any work done because we're in an open plan office and we can't hear ourselves think" outfits. But hiring policy is an issue, and so is PM. It needs people with a compatible attitude, and…
How are you supposed to onboard people onto a project? with training and teaching. What do you professionals do? They work with other professionals and progress with each other. What do you do with the world class experts you have? Make them work with other world class experts to make the impossible possible. Again, lots of collaboration and interactions needed! For anything non trivial or not explained by a stack ov…
You seem to be suggesting that "collaboration" and "interactions" are things that necessarily can only happen synchronously and via richer media than text. Even if you want to move away from OSS as an example, I'd point towards the centuries of intellectual discussion that took place via hand-written snail mail letters.
Is in-person communication faster? No question. Is it the only way to effectively communicate ideas as part of a two-sided discussion? I should hope not.