They had written a great way for Bond to survive and I think they should have done the same for Jaws.
However having said all that you have to give credit though as this film introduced the World to what would become a common sight of "The Space Shuttle", back in 1979 no-one knew about it's existance as far as I can remember and the first one didn't launch until 1981. They even showed how the Space Shuttle was transported on the back of a 747, which was a sensation back in 1979.
I love the Astronaut centrofuge scene, and is actually one of my all time favourite Bond scenes out of all the 24 movies.
I give Jaws the benefit of the doubt for surviving any situation as he seems to be indestructible. A bit of sly humor to show his cloths soaking wet in the next scene.
Honestly, I didn't even believe the shuttles were actually transported on 747's like that until a recent trip to an Air & Space museum. I was like, "Whoa, Moonraker was both surprisingly accurate and ahead of its time."
The centrifuge scene is also one of my favorites in the series. 