I just cannot imagine a premature cancellation of an IFR flight to avoid having to give illegal answers when going visual.
The context is a psychological one of get-home-itis, something i guess we've all at some stage noticed in ourselves, and in my view too little understood.
I pray i never fall victim to it in such a dramatic way, and we will have to wait for the findings, including all the radio communications before we hurt the family unnecessarily.
That said you are right that this could be a possible cause if this is what you were implying carefully