When I said "Self select", I mean it. I never, ever, want to fly with a person who is a pilot because he (she) was:
...A bit bored by biology and lured by the prospect of a big pay rise,
I will go to extreme lengths to avoid flying in any aircraft where the pilot has not started by gritting their teeth, walking into a flying school, and asking about how they can become a pilot, and then doing the hard yards, starting with hours in a beaten up C150.
My view is that this is going to turn out to be one of the most expensive mistakes ever made by airline management, even if only because of labour turnover, since if someone is doing this job for the pay, they will leave it for higher pay, or when they get "bored" like the subject who was "bored" by biology.
As for what a multi crew licence holder does when their computer controlled aircraft stops behaving as it should, like the BA 777 whose thrust levers didn't respond at LHR, I'll leave that to your imagination. My guess is they will look over their shoulder to see if they are in the sim.
I will avoid any airline that trains it's pilots this way, permanently.