IO540
I can see the thrust of your argument, however ...
Get 50 of them to blindly follow a moving map GPS while remaining at/above the planned MSA and not looking at the ground at all, for the whole route. No chart permitted aboard the aircraft, either.
Today's PPLs are pretty average people, and most can't even afford a decent headset.
So what makes you think such PPLs will be able to afford to have their GPS database updated to show CAS boundary changes every AIRAC cycle ??