It's the old "You're not the customer, but the product" thing. Google doesn't make Maps because you pay them for it, but because they want to know where you ar

It's the old "You're not the customer, but the product" thing. Google doesn't make Maps because you pay them for it, but because they want to know where you are, where you're going and how long you look at what. So they're not going to care much about how well it works for you without an internet connection, and the offline map probably only exists to check the checkbox and stop people from going to the competition.