I guess it’s kind of surprising in a relatively new plane, but I encounter non functional entertainment systems relatively often. They’re not treated like the safety critical systems by any airline
It is quite an intuition to decide to leave a plane in such a moment. He just escaped death and is now aggressively attacked for saying something potentially relevant.
(There may also be security rules like requiring continuing passengers to disembark with their hand luggage before reboarding. I don't know, it's 15+ years since I took a flight like this.)