As a user, I don't want any apps to have direct access to sensing hardware without going through Apple's APIs that control prompt for access and respect user settings.
Apple Watch doesn't have to play by the same rules.
If you think this is unamanageable and there needs to be more provision to protect your consumer rights, you should talk to the consumer rights regulators to ban the behaviors you need protection from, Apple isn't a proxy for that.
And as usual, the problem is not fixed, Apple just gets to chose who they get cosy with. Historically Japan Railways had privileges the France national railway didn't, for instance.
So yes, there is totally a place for private enforcement of a comprehensive developer agreement (read: contract) backed by automated review tools and human review. It’s not perfect, but it is pretty good.