In his Forbes article, Dan is very clear - Apple will NOT lead in Healthcare.
The choice of words is important. He uses 'healthcare', not 'health' as in hundreds of health, fitness and wellness apps such as fitbit. Real healthcare is in the realm of health monitoring such as blood glucose.
Once we understand this distinction, the implication becomes apparent. Healthcare is highly regulated. Just ask traditional healthcare players how difficult is the environment when it comes to providing products and/or services.
I think Apple is getting heady by trying to control and 'own' an entire ecosystem rather than being a part of it and facilitating the system.