The problem is that you Pace are an old hand in this game, but take the "average" PPL pilot who is struggling to get notams, and flies with a map+stopwatch (because GPS is illegal outside the USA; minimum fine is death) and put him in a Cirrus and see how far he gets...
I used to rent out my TB20 years ago. If I was renting a Cirrus I would insist on some kind of course on all the installed equipment, for a start.
These planes need to be flown "by the numbers" but that is not how flying is taught in the PPL.