This is a head-scratcher. I have two ideas about why Apple may have done this:
1. They are planning on releasing their own calculator notification center widget.
2. This is the hypothesis put forward in the article, that Apple conceives of notification widgets as essentially read-only sources of at-a-glance information.
Either way, it's clearly a case of the right hand not knowing what the left...etc.
Or a case of early validation for speedy AppShop deployment (which in 99.999% of the cases doesn't pose any further question), followed by human control and judgement (which takes a little more time).
1. They are planning on releasing their own calculator notification center widget. 2. This is the hypothesis put forward in the article, that Apple conceives of notification widgets as essentially read-only sources of at-a-glance information.
Either way, it's clearly a case of the right hand not knowing what the left...etc.