Just to balance this clearly biased view of hatred towards anatomy...
If you know how to drive, but you don't know where Melbourne Uni is and thus how to drive there, what on earth is the point of your ability to drive? In other words, physiology is only completed by anatomy. In an ideal world you should do both; the major is Human Structure AND function for a reason. Agreed that Anatomy is easier than Physiology, but definitely don't agree that it's not 'remotely interesting' :p
I don't dispute that anatomy's useful, but, to borrow your analogy, you don't need to go to uni to learn how to read a road map...
Banter aside though, doing anatomy and physiology together is a wise idea. They do feed into each other really well and you won't really get a full appreciation of either without the other.
That said, you won't really get a full appreciation of Biology altogether without Biochem/Molecular biol so...