Oversee operations != Drive the train.
There's a lot to be said for automating trains.
Almost all crashes are caused by driver error and most of the rest are down to substandard maintenance with a vanishingly small number caused by odd things like signal failure due to lightning strikes.
A train which can keep an eye on where it's going AND record/report track conditions in realtime would significantly improve the current setup where inspection trains only run over a track at weekly/monthly intervals.
On the UK's Docklands light railway, there is no driver, merely a supervisor - whose job is to open/close the doors and tell the train it can start. They often sit up the front even though there's no need to, as passengers reportedly feel uncomfortable when they realise there's no human in charge. (Although having observed them I suspect it's more about self-justification than anything else)