"I can count on exactly three times when the GPS signal faded or was not available...and never during an approach to GPS minimums"
So, 411A, let's get this right. You have experienced GPS becoming unavailable - so it is NOT 100% reliable. But because it happened not to be at a critical phase of the flight - it's all right then. Aren't you the lucky one! What if it had occured at a critical phase of the flight?
One major problem with GPS is if one satellite begins to transmit rubbish. This can result in incorrect positions being calculated and may take time to be detected and the satellite switched off or the constellation health message upgraded to broadcast this fact.
That's why there are systems like EGNOS which have fixed receivers at known positions constantly monitoring their GPS derived positions and immediately broadcasting notification of GPS unreliability. If GPS was perfect EGNOS (or WAAS and LAAS) would not be needed.
It's not a "not invented here" syndrome in Europe. It is more of a "it WAS invented here" syndrome in the US and therefore it MUST be perfect. Fact is, it isn't! And where lives could be at risk sticking your head in the sand is not a professional approach.