Six months from now, that singular worker if they are still employed, will manage a high number of receptionist avatars. And then they themselves will be replaced. It will still lead to a massive collapse in the labor market and with all of that excess labor, existing jobs while being overworked will still see flat to decreasing wages.

Blowing away the junior -> senior pipeline would, on average, hit every country the same.

Though it raises an interesting point: if a country like India or China did make the investment in hiring, paying, and mentoring junior people but e.g. the US didn't, then you could see a massive shift in the global center of gravity around software expertise in 10 years (plus or minus).

Someone is going to be the best at planning for and investing in the future on this, and someone is going to maximally wishful thinking / short-term thinking this, and seductive-but-not-really-there vibe coding is probably going to be a major pivot point there.