If a page about robotaxi work opens with the new roles, it is selling you something. So, plainly: the role being removed is driving for hire. Rideshare, taxi, car service. When a vehicle carries a passenger with nobody in the front seat, the paid seat hour is the exact thing that has been taken out of the cost of the trip. Everything further down this page exists downstream of that removal.
The removal will not arrive everywhere at once, and the reason is administrative rather than technical. Permission is granted region by region. In California it is split between two bodies: the DMV issues the permits to test and to deploy the vehicle itself, and the CPUC decides separately whether that vehicle may carry members of the public and whether they can be charged a fare. Two regulators, two timetables. That is why a fleet can be running in one metro area and completely absent from the county next door.
The roles that replace driving are fewer. This is a ratio, not an opinion. Driving is one person per vehicle for every hour that vehicle moves. Depot work is one person spread across many vehicles, and only during the minutes each one is stopped. Nobody can hand you the exact ratio today, because it depends on how often interiors need attention and how much of the charging ends up automated, and neither of those is settled.
They are also a different kind of job, which matters more than the count. Driving for hire has a short way in: a license, a background check, a car, and hours you choose. Depot roles are shift work, at one fixed address, on a schedule someone else sets. If you drive now because of the hours rather than the money, the honest answer is that this is not the same job with a new employer.
The fleet level view, the vehicles and the operators rather than the depot floor, is covered over on Robotaxi Hub.