So is you mom but we still play with her
Why doesn't a big game have the same polish as a small one? Well if you can do some basic math the answer isn't that far away.
Yes we would like all games to be polished to a mirror shine in every aspect, but the logistics of that for this sort of game are practically impossible.
Even if you somehow get financed for the minimum of 20-30 years to put all the content together the game would haveto be rewritten on new tech and engines nonstop, so who knows what a pile of snowballing shit you would end up with.
And then at the end you get outsold by Madden 729 ... fuck that