Notso Fantastic,
Your comment,
"Can you explain how an aeroplane would have a nose up attitude in an updraft and not rocket upwards?"
The resultant AOA from the forward momentum of the aircraft and the vertical component of the strong updraft, increased the lift and moved the center of lift forward on the swept wing, mechanically pulling the nose up. (Overpowering the tail plane force.) The resultant pitch-up attitude depends on the strength of the vertical updraft and the length of the moment arm, from the c.g. to the tail plane.
The aircraft continued on its projected flight path, in this attitude. Due to this smooth transition in attitude there was little loss of kinetic energy and therefore no imminent stall threat. There was no requirement for any fast reactive action to immediately shove the nose over to return to a normal flight attitude.