perhaps you misinterpretted my post; sure you need to identify the aid when you're using it but when you're tracking to an aid via the GPS, you're identification of it is by confirming it's lat/ long not its morse ident.
I don't think I misinterpreted you.
When you're tracking to an RNAV waypoint, sure, its just a point in space. The fact that it's in the same place as a terrestrial navaid is coincidental. The issue is what happens when you reach that point, and the next track of your flight is predicated upon a conventional Navaid. e.g. an ILS.
You always want to be one step ahead of the game, so whilst you are still navigating by GPS you'll want to tune and ident the ILS. Otherwise, when you reach the final waypoint and you're just swinging in the breeze from a navigation point of view. Not the time to find out you misread the freq, or its out of service etc etc.
Additionally, how would you maintain conventional navigation cross checks when in the en route phase using the GPS, if you can't identify an aid?
Look, you made a switchery screw up, and as you said be more cautious next time.
pb