Well the CAA seem to think it is?!
... and they certify the sims
A training simulator is
qualified by comparison of its behaviour against a defined range of manoeuvres which are intended to validate that it is sufficiently representative to undertake the training role for which it is intended.
It is not validated for use for manoeuvres outside that envelope, and use of a training device for engineering purposes - whether for investigations such as that suggested, or for certification purposes (such as, say, windshear escape guidance certification) is subject to
substantial additional validation testing, often of the same magnitude again as that used for the training validation. All of the certification agencies are well aware of the technical limitations of a basic flight training simulator; they are the ones requiring the additional validation (though I would not propose its use without that validation, even if they did not).