[ConservChristian]

This is all great but why can't we just seal the door to the cockpit?

[Servant of the Nine]

It works for El Al.

I think 90% of todays pilots would quit before flying a plane that was locked on autopilot.

[Restorer]

This is all great but why can't we just seal the door to the cockpit?

How long would the pilots keep the door sealed with the flight attendants and/or passengers being killed and/or tortured on the other side to induce them to open up? That is apparently what happened on at least one of the planes Tuesday.