AFAIK GPS outages are predictable and are promulgated by AIS notams as likely to affect certain airfields between specific times on specific dates as a function of satellite coverage, maintenance downtime etc.
Not being able to rely on GPS and to have a backup plan sounds eminently sensible in aviation to me. After all we don't plan on all engines, generators, hyd systems, etc working on board nor on the wx being fine nor the CAT3 ILS being available when flight planning.
GPS availability (or lack thereof) is just another part of the planning process, imho.
The US still have the ability to put an uncertainty factor into the GPS accuracy in times of need anyway, wouldn't that render GPS approaches invalid/unusable.
He may have a curly 'tach, but is he actually saying anything new?