It doesn’t though, AGI have far greater implications than doing mundane work of today. Actual AGI would self improve, that in itself would change literally every single thing of human civilization, instead we are talking about replacing white collar jobs.
Not to worry, humanoid, generally useful robots are only a few years away.
An AGI that can do all that would also necessarily be able to do all white collar work. That latter definition I'd consider a "soft threshold" that would be hit before recursive self-improvement, which I imagine would happen soon after.
The current estimation on the time between this is fairly small, bottlenecked most likely by compute constraints, risk aversion, and need to implement safeguards. Metaculus puts it at about 32 months
https://www.metaculus.com/questions/4123/time-between-weak-a...