Can one use Apple's Bootcamp drivers on a Parallels VM?
This is unlikely to work, though I haven't tried it. If I may esplain...

The bootcamp drivers are for windows running on a specific number of Apple Macintosh computer models. In other words the drivers are for specific computers.

The Parallels VM is an emulated PC that may or may not have any compatibility with the Apple hardware.

It's kind of like going to the Dell drivers download site, downloading drivers for an (lets say...) Optiplex 9020 and than hoping those drivers will work on the new HP you just brought.