I think it's clear that Apple has recognized that their target markets don't care to have useful computers. Just look way back to when Steve Jobs was still alive and he was talking about how "PCs are going to be like trucks. Fewer people will need them. And this is going to make some people uneasy."
They could certainly add features to make them more like general purpose computers, but there's a bit of product development and engineering "tax" they'd have to pay over time to maintain that aspect. Much easier from a product development standpoint to create products that provide a walled-garden experience, especially if that's what most customers want.
They could certainly add features to make them more like general purpose computers, but there's a bit of product development and engineering "tax" they'd have to pay over time to maintain that aspect. Much easier from a product development standpoint to create products that provide a walled-garden experience, especially if that's what most customers want.