Every time I turn my Garmin GPS it warns me that maps might not be correct, so it's not just Apple.
That said, Apple should have written a big fat check to a company with much better data. (I still think Apple needed their own mapping and apparently maps improve as more users use them.)
It isn't a case of buying a better dataset, Apple needs to use the good data they already have correctly. See my comment below; in this case Apple is giving co-ordinates for the center of the Shire Of Mildura (a local government region), instead of the co-ordinates for the town of Mildura. Both co-ordinates are in the free GeoNames dataset that Apple already has access to.
When iOS 6 was first available, I hit a link to a restaurant on a web site that opened Maps to the restaurant's supposed location. The location it opened actually had the restaurant's exact, correct, latitude and longitude. But Maps decided it knew better and showed me where it thought the restaurant with that name was, which was about a half mile off. If I removed the name and left the lat/lon then it was correct.
Or just search for "emergency room" and notice how, even today, it still shows tons of medical stuff but no actual emergency rooms.
That and they are using Tom Tom data for navigation. There have been 100's of stories about sat navs taking people on wrong turns, but when it's related to an iPhone you'r going to get more hits!
That said, Apple should have written a big fat check to a company with much better data. (I still think Apple needed their own mapping and apparently maps improve as more users use them.)