Wow sounds like the $99/yr the commenter was saying developers "pay" Apple is a trivial amount and cannot be used to justify the development of an entire SDK that maybe a dozen companies will use.
I see no reason it cannot be a private entitlement similar to the other sensitive entitlements on iOS.
If you're astounded by hackers asking practical questions, maybe you should stop carrying water for corps and see how your back feels. Let's talk shop, what are the roadblocks Apple faces here?
This isn't exposing business logic, this is an operating system vendor deciding what it exposes to vendors. There is clearly an API that the apple watch is using to communicate with the OS, why shouldn't other vendors be allowed to access this?