Why? You're confusing cognitive and morphological evolution.
Yes, it would be amazing and we should have colonies in space by now... if we had really been around for a million years.
Maybe, if anatomically modern humans had been around for one million years, but we haven't been. I also think you more than slightly discount the costs associated with the earliest paleolothic tool technologies -- the jump from no tools to the simplest stone tools to more complicated, designed stone tools represents a much greater cognitive shift than the jump from chariots to corvettes.
When exactly were there "no tools"?