Dingerx hindsight is a wonderful thing is it not?
Let me know when you can walk on water as well and then I will defer to your superior flying skills.
No one would reverse the elevator by that amount 30 feet above the ground in a widebodied a/c let alone any jet transport without what they considered just cause.
That would have to happen in the blink of an eye and the ONLY reason to do that would be windshear.
As to whether or not he should have commenced the approach is another thing, how many a/c landed safely before him, how many either discontinued the app or did'nt commence one?