Hidden Outs

In TOP, Prof. Slansky states that failing to account for all hidden outs can cause a player to fold a hand that might otherwise be worth playing.

That said, wouldn't one's opponent also have a few hidden outs that increase the value of his hand and decrease your pot equity?

It would seem that taking into account your hidden outs without allowing for your opponent's would cause you to give your hand "props" it doesn't deserve.