You're not over-valuing the suitedness. That's correct. In steal situations your cards are often just playing back-up. The actualy theft and folding equity that your raise buys is where most of your profit comes from. Then, when you start playing with your cards most of your profit in limit hold'em comes from your opponent's mistakes. When you hold a strong draw you can push your hand hard by semi-bluffing profitably and giving him the option to make even more mistakes.