My belief--completely unscientific and purely philosophical--is that God chooses to make it look random, so as to not leave His fingerprints all over the place. He does this for one purpose, and one purpose only--to not interfere with our free will.
If God were to leave definitive evidence of non-random evolution, then our ability to freely choose to serve him would not exist.
It's like this: suppose there is an elephant in the room with you. Theoretically, one has free will to say that the elephant isn't there. However, no matter how sincerely one holds the belief that there isn't an elephant in the room, the room is STILL going to be extremely crowded.
An excellent point. Thank you! :)