Why? iTunes (during the PC era) was written for the PC platform to increase market share (since 90% of the world's computers ran Windows). All this was done with Jobs at the helm of Apple.
Now Android-based devices in all their flavors have a much larger share (and growing) of the post-PC environment than Apple so it makes perfect sense to open the iTunes ecosystem to Android devices to increase market share and increase revenue. I bet there are very few Apple shareholders that have a problem with android devices having access to iTunes.
He had to be nagged constantly for ages to do iTunes PC. In the end after so much nagging he screamed "Fine! Do whatever you want I don't care" (or something similar) and stormed out of the office.
He never budged on iTunes for Android though.