Not the case at all! When you are counting, you raise your bets when there are extra high cards remaining in the shoe. You don't know you'll be dealt the high cards, but you still have the advantage. You could end up with a 16 against a dealer 20, but given the same situation again, you'd still put out the big money.
It's the same here. Even though you can't know the outcome of the hand before it's played, by having a 10 positioned as the dealer's first hit card you have a massive advantage. No one hand has a 100% advantage (remember this is a team technique, you couldn't steer a card this accurately with plooppies on the table), but each hand has an average of somewhere around 30% advantage and this means that if your team is playing 7 spots, you will have over 100% advantage (to the astute out there you'd be thinking "why not 210%??", but you have to remember that you shouldn't have more than 3 BIG money hands out as you're going to have to take hits on the small money hands to ensure that the card lands where you want it).
As to your comments Bojack - fair play to you. If you have acctually played these games with enough accuracy to make them profitable, well done. Not many people ever manage that. I myself have never played a cuts game. Plenty of opertunities, but have never been able to assemble the team to do it. And i do understand that this can be a high varience play, but with the bankroll and an advantage that high, getting to the long run (i.e. where your EV is bigger than 1 or even 2 standard deviations) is certainly not years of play away, it's in the 100's of successful plays of this technique.
RJT.