God certainly had the power to make us all believe in Him without resorting to giving His own life and passing the faith through 12 men. He chooses to work this way and, hey, He's God... He can.
My own fallible understanding of Him would lead me to answer your question by asking "what is the purpose of faith?" If God can be reduced to a mathmatically formula, then what jewel is found in fellowship? If there is no faith, then there is no real acceptance. Let's put this in human terms... we don't have relationships with each other that are impirically static. How rewarding would that be? In order to have a relationship, there has to layers of discovery... once everything there is to know is known what point is there to further exploration? A relationship without mystery (even some small mystery) isn't alive.
All may come to Him but not all choose to. It is a choice to make, not a formula to complete. I asked earlier who is God in this scenario (and it applies to your question), the one who Created all that is and exerts sovereignty or the one who was created who DEMANDS proof?
You don't believe because God doesn't conform to man's understanding of science... just who is God here anyway?
That simply defers the question. Why would a divine being, having created the facility for rational thought, want or value faith? 'Faith' as the rational expectation that someone who has been true in the past will continue to be true is fine and virtuous; 'faith' as the acceptance of an assertion, on the mere say so of someone else, is not virtuous.
You don't believe because God doesn't conform to man's understanding of science... just who is God here anyway?
I don't believe or disbelieve in a divine being. There is no data on the question that I consider of any value; since the question in my opinion is of no urgency, I simply defer any speculation until I see some evidence.