Spot on... simulators miss the point. Nothing beats getting your hands dirty and learning from actual mess-ups. Virtual training can't copy the stress of real world pressure. New folks might know the steps, but they haven't felt the panic when things go wrong. That panic... that's where real grit comes from.
Reminds me of when my new guy cross-threaded a fuel line during a Friday afternoon rush. He had done the simulation fine, but with three cars waiting and the shop phone ringing, he forced it and caused a leak. We had to redo the whole assembly and stay late, but now he checks every thread twice. That stress taught him more than any training program ever could.