If there really were a god, nobody would need faith!
Faith = Trust. Sorry, but you FAIL–once we see that God exists, then we would still need to trust him. That trust is informed by reason (not opposed to it), by virtue of God’s past dealings with humanity. Those dealings are described in the Old Testament, and the sovereignty of God is re-enforced in both Testaments. God has ordained the end as well as the means: he is in total control. As Jesus aptly put it, “Whoever is not with me is against me, and whoever does not gather with me scatters” (Lk 11:23).
The issue is your definition of “faith.” It is most emphatically not “blind faith,” or “belief in spite of overwhelming evidence.”