Of course there is nothing wrong that God is the answer on the big why question.
But it is wrong to neglect that there can be other answers as well.
You say a conscience can not have evolved.
Why not? I don't think it evolved, but I don't see why it couldn't have.
Having a conscience proves absolutely nothing.
Did we get it from God during creation? Or maybe from Allah? Was it Jupiter who did it when he was trying to piss of some other roman gods?
Maybe it was the enlightened dolphin in the holy seas of Per Dur? A'tuin the big turtle with the four elephants on his back?
No way to know, so stupid to say it is proof for the Creation.
As said. It proves nothing!