I understand. Now I'm all for historical precision (and thus would be tempted to question some choices), but on the other hand a rich technology tree (with several choices to make) enhances gameplay, and this is first and foremost a game, isn't it...
I've chosen to make my debut in 0 A.D. (and 0 A.D. modding) with the Britons, who have pretty little choice in units and structures compared to some other civilizations. In my case this keeps things simple and helps keeping track of things. And while I admit this is pretty much reality of that civilization at that time (especially compared to some others...), on the other hand from a purely gameplay perspective the Britons aren't very "sexy" to play with: Not many strategical or tactical options besides "me see, me hit".
Having some unique techs or units would be nice. And not just the fairly common champion swordsmen, lots of other civilizations have those. I mean something other civilization could be jealous of...
TL;DR: Historical reality should allow for small (not too blatant!) compromises, generalizations, and even inventions, if this makes some of the more "unsophisticated" civilizations more interesting to play. (IMHO, YMMV and all that.)