Why do people always Monday morning quarter back. 7700 on short final with a plane on fire is probably the last thing on a guys mind. They don't have time to run the smoke removal checklist and briefs for evacuation let alone think of all the possible ways to let atc know they are on fire.
It's like guys have never had a time sensitive emergency. The us air crew never made it through the ditching checklist, should they be reprimanded and scoffed at by peers who obviously have never had a true time sensitive emergency?
Lots to learn from every incident, let's try and pretend like you might not get it perfect with 2 minute clock and a burning airplane. Lots of perfect pilots on these forums.