You're right of course but they could also have an easier time guiding a plane down if the pilots watching the aircraft needed to get a passenger to do it. Per

You're right of course but they could also have an easier time guiding a plane down if the pilots watching the aircraft needed to get a passenger to do it. Perhaps hijackers seeing armed missiles out the window might rethink their negotiating position. You never used to hijack a plane to kill people that's fairly recent.