God is far greater than a heavenly dispensing machine! When we treat him like that, we sell him and ourselves far short of the relationship he wants with us. It would be like getting married just so you have someone to do your laundry and wash the dishes! That's not a relationship—you can hire a servant for those things!
It's the same with God. Sure, he answers prayer and gives us all kinds of blessings. But that's not the point or the goal of the relationship. We were created for far more than that! We were created for fellowship with God.