When I first read "killing their competition" I thought it meant killing competition in the form of weather apps. That didn't make any sense to me since Apple makes no money off the Weather app. Only after re-reading that sentence a few times did I realize the OP meant killing Android.

That said, I don't believe that to be the issue either. Death by a thousand cuts, maybe, but I seriously doubt closing off one app from the Android ecosystem is going to do any damage whatsoever. I think this is more about the acquisition of talent and nothing more.