Except… there’s a little bit of our brain that loves the gamble. Look at random-content games like Diablo. Frankly, the randomized loot is half the fun of the game. It’s the same sort of compulsion that works for me in games that throw some randomness into the character creation process. Do I hit, or stand? Is this current collection of points sufficient for what I need to do? Maybe I was trying to make a wizard, but I just got some great fighter stats I should save off for another party member (in games where you play a party).
For some reason, this also appeals to me as more interesting decision-making than point-buy systems. Maybe it’s because I constrain myself too much to avoid weaknesses, and thus always end up with characters with very similar characteristics.