Akro,
Do you actually understand anything I have posted? Or are you so full of rage you aren't actually processing what you are reading?
The Backup Navaid Network is the redundant system for GNSS.
The Backup Navaid Network is not required for normal ops ie GNSS available. Therefore my statement that you called foolish is actually true.
The Backup Navaid Network was developed with consultation of Airlines, Regulator and AOPA.
So now we are down to the only argument you have left. And that is essentially "but AsA could have left a few more navaids for training" No argument here, but that horse has bolted.