Theology isn't wrong. It's the seeking part of "Seek and you will find." But if we have an inordinate fascination with theology as an end in itself--if we make theology our "stairway to heaven," so to speak--we miss out on fulfilling our purpose in this life, here and now. Indeed, the human body is a finely tuned instrument, specifically designed for one purpose: knowing God (see The Joy of Being, Explained).
Theology is the study of the idea of God. It is at least one step removed from the actuality of God--God's presence. Ushering people into God's presence is the goal toward which religions aim. Once that's been achieved, theology becomes superfluous.
Theology is a description of the idea of God. When you know someone, to the extent you can know anyone--that is, when you've met a person, been in his or her presence--descriptions become unnecessary.
Author and former nun Karen Armstrong expresses the Buddha's view this way:
"Religion is like a raft. Once you get across the river, moor the raft and go on. Don't lug it with you if you don't need it anymore." (For a thorough account of the Buddha's view, see An Excerpt from Karen Armstrong's Book, Buddha)
[See Eckhart Tolle's view on theology here: Excerpt on Theology from Eckhart Tolle's Book, The Power of Now]
Theology is of man (humanity); spirituality is of God.