Earlier quoted context omitted.
If you believe that Apple is making a lot of money with their App Stores, sure. But they don’t. Even with the absolutely massive iOS App Store. The Mac App Store is tiny in comparison. It’s just not Apple’s business model.
Exactly the Mac App Store is tiny. Make it the only way to install apps and it suddenly becomes more popular.
Apple has backed off on harsh decisions for much less than that. Remember Final Cut X? I bet the video editing community is much smaller than the developer community. Google, as an example, uses a lot of Apple laptops. They'd instantly stop buying them if that happened.
Until there's any sign of Apple wanting to close OS X, this is purely FUD.