And in turbulence, in a high workload situation, try tapping the screen to change the map orientation or select a GOTO.
Chances are you will accidentally tap the wrong thing, and while staring at the screen trying to rectify it, the airplane will wander off altitude and or heading and make a stressful situation worse.
I use Avplan and find it a great BACKUP but where i fly, you MUST look out the window for obvious reasons.
Too much reliance on electronics for the average recreational pilot will end badly eventually.