Mechanical calculations cannot be more accurate then the mathematical or phisical model you are using.
They are what they are, just computer models you can do with whatewer you want to.
We have the experiment (crash), with a long line of trees and wires cut/damaged by the plane, being like an additional, external FDR. If the simulations does not match the experiment, it just means they were f** up. Simple as that.
According to the recent findings
Those are not some findings, but rather a bad joke.
Arrakis