The article title seems like an overreaction to a really sad situation. We have to trust at least someone, and although he clearly had some issues (maybe recent), he wasn't out to hurt anyone or aligned with any groups that wanted to inflict harm. Fighter jets were there immediately, people tried to talk him down, and he was lost. Nothing better could have been done all around. Yes, commercial planes could be keycode…
Hmm I don't think it's that much of a headache to have some PIN code provided to pilots as an additional measure. These planes aren't cheap, even a small personal jet is in the low millions. A Boeing 747 or similar is in the hundreds of millions.
One other commenter here mentions a simple ignition key would have prevented this incident, but there's been at least one major ignition system flaw in cars that caused multiple deaths ( https://en.wikipedia.org/wiki/General_Motors_ignition_switch... ), and the consequences of a failure causing loss of control to a passenger aircraft far outweighs that in a car.
Given the very low rate of unauthorised takeoffs of passenger aircraft, and that this case was an insider who may have been able to gain access to keys/codes anyway, is introducing introducing a new system to aircraft justified?