Vectoring the thrust 45 degrees downward is certainly possible in a terminal touchdown.
Hardly; ............... not even close.
This ain't no Sukhoi SU30 or F-22 or Harrier with vectored thrust. We're talking about a big commercial airliner here. It doesn't have thrust vectoring and it sure as heck won't be controllable at 45 degrees angle of attack.
You don't happen to be a technical expert working for CNN, do you?