I dont require AAA graphics in games (there are no games with AAA graphics anymore, in any case) but today, having good graphics or at least tuned up for the game specifically is pretty important. This game without decent graphics will be pretty bad, because one of its main atractions is to see how the sims interact, and their expressions and so on. With bad graphics its way not the same lol not even closer.
Even its gameplay was amazing, it wont matter if graphics are bad.
You can test it, set the graphics detail of the game in low, and see for yourself. Horrendous. I speak for myself when i say that i wont be playing this game if graphics were not decent enough.