What ever argument you put out there its still irrelevant. A log out button is a basic necessity for any game out there. This is probably the only game that has a log in button, but not a log out button. If you can come up with any other examples of a game with accounts that can sign in but not out then please show me them.

Your argument right now is equivalent to saying, "So what if he was born without one leg, he can still hop around so there is no need to fix it."