The common operations are stuff like tyres, brakes, clutch exhaust, oil change, air & oil filters, and windscreen wipers.
Still need tyre changes. Brake changes much less frequently, due to regenerative breaking. And clutch exhaust, oil change and filters are not needed at all.
In addition there is the need for the occasional battery swap. But probably no more often than the transmission needs swapping in an ICE. And changing the battery is going to be a relatively easy task, given shop lifting gear.
Body work hasn't changed.
It's not that we won't need any mechanics at all. It's just that the work will be much less, so there will be far fewer of them.