Nick,
Why would Sikorsky build a 76 and not make a RadAlt a basic instrument package item?
Immediate answer will be....ah..it is a customer option.
Next question....why would an operator buy a 76 and not install a RadAlt?
Are you telling us the pilots driving the thing don't ask for the RadAlt?
If the pilot's ask for equipment and the operator does not install it....then what Nick? Strike action or something?
Sounds like you are on the side that thinks accidents are "pilot error" even if only through acquiesence as a subset of the aviation population.