It's not quite that simple :P

Having X-ray vision would give you the ability to get just about anything you wanted. For instance, what good is a lock on a safe when you can see inside the lock to open it? You no longer need a combination at that point, assuming you know how a lock works.

Also, you could easily look into someone's wallet and find out all of their information and steal their identity with ease. You could look through the walls of someone's house to see basically everything about them.

Getting any use from the power would mean you would be doing pretty "evil" things, but it isn't a useless power by any means.