In other words "let's stop working for the customer and instead just think of ourselves"!Could be because it's easier for Apple set packages versus having options, which ultimately causes more in terms of ease and perhaps it's a quicker process to ship/manufacture.
I don't buy into it being quicker, as wait times are longer than I had for my series 0 purchased a couple of months after first released.
I can though see where you are coming from with the business point; it makes sense, at the expense of the customer.......again.