Except you have it backwards. The play store is the primary vector. The play store is also pre-installed on Android devices, and even without the whole verification nonsense, you still need to allow a different app repository to install.
Not cleaning their own play store up first means it has nothing to do with what they are claiming. And lets be candid - they have absolutely not.
The analogy is bad specifically because its not reflecting the issues anywhere near accurately. This is closing a window on the second floor while the front door is wide open with a sign that says "Come on in!".