...and because Parallels Desktop is supposed to be running on Intel Macs the hardware used is expected to be the one that comes with Intel Macs.
I didn't say it was unique, you're going on a tangent. What I implied was that the majority of Mac Intel users would use the built-in webcam, thus reducing the number of people with your problem thus reducing the motivation for Parallels to deal with it.
But like I said on m first post to this discussion, built-in webcams come with all intel macs except the Mac Mini.