What I mean is that usually someone will be pretty close to 6 achievements when the game is at age 9. In that case, unless you can deplete the piles immediately score a lot will not help you more than score a little bit to reach for the next achievement. And there are quite some other ways to score a little by that stage. Also, more often than not you need to get/block special achievements and Suburbia is not particularly good at that.
Okay, I can even retract that statement. Maybe the card is somewhat useful whenever you have a large hand. But it is absolutely useless if you don't. (I don't see how the piles being empty changes that...) But then a large hand is usually strong enough without this effect.
Don't take me wrong, I am not saying the card is not powerful. I am just saying there are already lots of things you can do with a large hand, and this card just adds a quickie for you to win (which I don't like.) And if you don't have a large hand this card is useless.