There have always been charge-only USB cables, they're just not all that common (I believe many mice come with those for charging, but I don't know where else you'd get one). I agree that it is a problem for Apple to be shipping a charge-only USB-C cable, both because this significantly increases the number of charge-only cables in the wild, and because this is probably the first USB-C cable that their customers will have and it's confusing if it doesn't actually act as a generic USB-C cable.