Busyness Leads to God Hiding Himself?

At times when someone asks, "How do I deal with the hiddenness of God?" it is not God hiding Himself from us, but our own sin or busyness and neglect of the Lord that is the problem. Are there so many things that "have to" be done in my life that would lead me to leave God out of the picture? Is excelling in school, at the cost of spiritually shipwrecking, the right decision?