There are a few fields where there’s capped demand so extra supply would mean less humans.
But I think people will be surprised by just how much of our economy is capped by supply, and what happens to niche demand as supply rapidly increases.
The people most in trouble are the ones that really suck at what they do, and whose only job security is constrained supply.
But at the same time, lowering transactional costs (in the sense of the essay “the nature of the firm”) will mean a lot more opportunities for small and medium entrepreneurship around passion side gigs suddenly being economically viable as full time gigs.
In reality, the groups most screwed long term here are going to be larger corporations who lose the advantages of scale but are still weighed down by the hindrance of slow moving bureaucracy.