Yes, and it's the % of CFIT accidents that occur with aircraft fitted with GPWS that we should also help prevent.
If FSI say that two of the best mitigators are ATC and radar, why not use them.
I have GPWS in my aircraft and I have found they are not faultproof- thats why I would be happy to pay a little extra and have the safety backup of ATC and radar where it is already available.
You seem to be hell bent on protecting the existing AsA position- why?
Is it that your lifetime working for the Governmnent has somehow ingrained in you the belief that some type of infallibility results!