honestly, when i was playing the demo i was thinking the same thing...
BUT im a 4.5 year senior and i dont graduate until december. about half my friends have graduated, and they ALL play fifa, and about half the people i hang out with who havent graduated are all soccer players, so they play all the time. you KNOW they're all gonna get it, and i want to be able to play online with all of them, especially when i move out west in a couple months.
also, AT&T just sent me an $80 rebate in the form of a debit card, which means it's a sunk cost since i cant put it in my bank account. that basically spelled FREE FIFA, so i just went ahead and pulled the trigger the other day.
that said, the game is sick, and totally worth it...ive only stopped playing to do some school work or to play ACTUAL soccer in the awesome weather we're having right now.