TC
There's no hair-splitting going on. People are quite within their rights to debate whether IVRS was the cause of the crash or simply a 'state' the aircraft ended up in after a sequence of events that went badly wrong.
It's like saying the Costa Concordia sank because it struck rocks. Well, yes it did but it would never have occured had other holes in the cheese not lined up.
To say the crash was caused by IVRS or VRS is a gross over-simplification of a somewhat complex scenario.