He said those things as he was reinstalling him into that position at a big ceremony-- AFTER 911 had happened. (Forgive me, I can't remember what the specific event was.)
He had the opportunity to get a new CIA director at the time. (Thank God for Goss, BTW) But he kept Tenet in there for four more years.
Please don't try to excuse these mistakes. What about, as an example, Kennedy and his big, stupid education bill a few years back? Naive is the kindest way I can characterize Bush's approach to these kinds of things. Others are not so forgiving, and I don't necesssarily disagree with them.
Well .. we cannot expect people to be PERFECT. No one is. If we expect perfection .. then we're always going to be disappointed.