My take:
The dark ages of navigation by stopwatch and compass are gone. The dark days of wobbly VORs and lightning detector NDBs are almost gone. GPS knows where you are within +/- 100metres, mostly less.
When the primary means of VFR navigation (mapreading) tells you your location to within one mile (if you're lucky and the wind hasn't shifted), and the secondary means of navigation fixes you within 100metres, which is more reliable?
Yes, the electrics could die, but a spare GPS on batteries following the same route would keep going for at least 3 hours - more then enough time. On the flip side, what if your visibility sudden goes down to 1 mile or less while you're mapreading the old fashioned way in a C152 with knackered avionics? Oh dear, you're in big trouble - especially for a PPL. We all know it happens.
It's a bit like comparing a sextant to an INS - the INS will let you avoid the mountains, but the sextant will give you a closer approach. I'm sure airline pilots whined about the sextant being easier to use - do the use it now? Mapreading is fine for PPL training, and nessescary, but if you're lost in low vis and out of range of 121.5, GPS WILL save the day (as long as you know how to use it).
Mapreading, NDBs and VORs are now secondary navigation - like it or whine about it, GPS is here to stay. The Wright brothers flew 103 years ago - maybe we've found a better method of navigating - and none too soon.
I'm very grateful to Dublinpilot for showing me his incredible GPS setup on a flight last year - it really opened my eyes.