That's kind of jumping a few steps ahead; it assumes that we know 80% of office jobs can be fully automated already. And if that were the case, we'd have non-AI software doing that already. I mean we do, but it's not causing people to lose jobs en masse.
(it probably did cost jobs, but more the kind that a job like data entry was replaced by OCR)
There are likely huge unmeasured inefficiencies built in to many companies. You hear anecdotes of people whose job for years has been to perform a particular task, which could be either automated or performed more efficiently (by orders of magnitude) by someone more capable.
So on the one side, there’s huge opportunity for automation and job cuts. On the other, if the companies haven’t noticed the inefficiency so far, then…