When it works, such a system basically outsources your shopping list to an algorithm so you don’t need to worry about it, and a worry-free customer is often happy and loyal. The convenience of knowing you’ll never run out of toilet paper, for instance, is sure to encourage you to do more shopping at Amazon, because it frees up your time to do other things. Let’s face it, most shopping is mundane and we wouldn’t mind someone else taking care of it for us. With anticipatory shipping, Amazon is basically absorbing that responsibility, and the consumer wins. (via Why Amazon’s Anticipatory Shipping Is Pure Genius - Forbes)
Yes sure send me the essentials when I need them, but if you anticipate everything I want, where are the surprises in life, as they are the ones that end up being the most important.