I'm pretty inexperienced, but I'm starting to learn the hard way that it takes more discipline to add more complex error recovery. (Just recently my implementation of what you're suggesting - limiting the blast radius of server side errors - meant all my tests were passing with a logged error I missed when I made a typo)

Considering their level 1 and 2 support techs couldn't access the so-called "low level" logs with the actual error message it's not clear to me they'd be able to keep up with a system with more complicated failure states. For example, they'd need to make sure that every plan rejected by the computer is routed to and handled by a human.