I don't believe you are reading the report as closely as you could
I read those comments as relating to the 140KT condition. They are written after the concept of loss of control at 140 Kt is introduced. Earlier in the reference when rotation and initial lift off speed were discussed the forces were labelled as " manageable".
Frankly, think there is a big question about the relevancy of 140 Kt. The best rate climb speed is 121 Kt. Surely, there is no need (in an emergency situation) to go faster.
And if the simulator was not relevant and the loading not able to be represented, then what on earth was the ATSB doing it for??