Most trucks drive similarly. A Vision Jet is a far different airplane than a Pilatus. Automation is better because the computer is designed for that specific aircraft as opposed to having a bunch of on-call pilots that just so happen to be type rated for that specific plane. And if they aren’t type rated, they are more of a liability. It’s very expensive to get type ratings so that remote pilot concept just wouldn’t scale. A 787 pilot isn’t going to know the intricacies of a Kodiak and besides, what pilot is going to want to sit in a ready-room for a shift for days on end with nothing to do? An incapacitated pilot is so rare that automation is a high enough percentage that it’s a fine solution. There is already a pilot shortage — hiring type rated remote pilots to just sit and wait around isn’t going to be easy.

> ... what pilot is going to want to sit in a ready-room for a shift for days on end with nothing to do?

Possible scenario: if pilots are already sitting in a simulator for currency training / testing, it may be possible to have the sim be 'reset' to a live feed in an emergency.

You wouldn't have them hang around 'just in case', but rather use people who are already present for some other reason.

Another possibility: pilots are hours-limited for a given time period. If you have pilots that have hit that limit, some may be willing to spend time in a ready-room for a nominal bonus.

When a truck (or a train) can't see what to do on its own, it can brake to a full stop and remain motionless until a human intervenes. Cell network crashed? Mountain in the way of the transmitter? Somebody stepped on the cable? Whatever it is, most problems will be averted by just always braking to a halt and waiting.

This is not an option in a plane. If it was, this technology wouldn't be needed - if the pilot is incapacitated just brake to a halt and step out of the plane...

A plane entering an ad-hoc holding circle is much less of a risk to its peers than a ground vehicle coming to a stop on the open road.

That highly depends on where that circle is.