Exactly, it's that overwhelmed state with resulting tunnel vision or chasing the wrong thing that is so common in aviation incidents. If you have a big issue, the ECAM screen lights up light a Christmas tree. There is logic in the system to ensure messages are prioritised, but in the end the humans still have to systematically figure out what's going on.

What causes more issues in flight is that you have to maintain control of the aircraft while determining the issue and making a plan. Which in zero visibility doing manual flight has a significant mental load by itself, so if the automation is affected by whatever issues you have, one crew member can't sit back and 100% think.

It's probably hard to simulate that extra load/stress for cyber incidents. For MCC training it's done in a flight simulator so all the noise, alarms, and having to maintain control is there.