It was a controlled descent (albeit at a high rate for a civilian airliner) which was exactly the thing to do given the loss of pressurization.
If you want to see plunge, try an F-15, idle, speed brakes deployed, from 40K or so.
I’d like to see a vid of that. Anyone with the training and the guts to get behind the stick of the F-15 is a hero to me, and I have been a firefighter for 26 years!