Nowadays the technology exists, both for vision and single pilot operation.
I do love this old chestnut.
Trains must be the easiest form of transport to automate but what percentage of the worlds trains are driverless?
Cargo ships must come a close second on the high seas, they are brought into port by a pilot crew anyway.
So back to aircraft, if a pilot is required then one assumes we need a spare as a back up, seems reasonable.
We will lose some cabin crew before we lose one of the pilots, no doubt about that.