This is correct. There are two main biological activities involving creatine, a combination of amino acids: 1. it facilitates recycling of ADP back to ATP, obviously more ATP means more energy, meaning ability to do more reps 2. it acts as a pH buffer, countering the fatigue effects of lactic acid buildup.

So no, taking creatine without doing the work probably won't make a difference (except to your wallet), but use in conjunction with consistent and effective exercise, the effect is real.

One thing though: don't bother with the creatine loading phase, it's a marketing scheme to sell more product.