[bluGill]

I'm not convinced - in a commercial airport taxiways are controlled by a ground control systems, not just pilots looking out the window. If the only airplanes around are also equips with the self taxi system they just report position to the central control and that tells them when to go. There needs to be emergency overrides for when that system fails, or a small plane without it is around, but that can be handled by stopping everyone else in the area until the hazard is gone.

Time will tell...

[toast0]

There's also all of the service vehicles when you get closer to the gates. The likely damage from an incident during taxiing is much less than during take off or landing, but I think the risk of having an incident is higher and the situation is trickier to manage. And it's super doable to have a pilot come on to manage that, and drop off after the hard part; you couldn't reasonably have pilots do a takeoff and then jetpack over to an arriving plane to do the landing, but it wouldn't be unreasonable for ground moves... similar to canal pilots taking ships through canals.

[xvinci]

Do you have a source for that? As to my knowledge advanced systems (such as lights on the twy directing you) are only present at very few airports. Recent incidents even happened due to RWY incursion without a ground controller noticing under bad visibility. So we are at a level where your runway is not even protected accordingly, let alone your 50+ taxiways.