No, there's not as big a difference as you're implying -- because ALL mapping data is imperfect, therefore ALL smartphones are capable of actively misleading you. And paper maps can mislead, as well! (I'm trying to think how many "this place is closed/moved/never here" notices I sent Google Maps myself, because of the number of times I've been misled by Google Maps!)

A smartphone is not a replacement for common sense. In Apple Maps, you can clearly look at your destination and say "Hmm, wow, that doesn't look like sprawling medical complex, perhaps this tiny out of the way building isn't a hospital".

People have been misled by Google Maps and MapQuest and Tom Tom for years and years. How common are stories of people driving off of cliffs or other such nonsense because a GPS said so?

Yes, Apple Maps isn't perfect, but it's a long shot better than Google Maps and MapQuest were six months into the product, and is actively providing superior maps to the baseline of a decade ago, or even five years ago.