Its not for the royal family nor is it to protect the Kabah but for people who get excited and have a urge to see the inside of the Kabah it is for them. It would create a havoc if their was no security and everybody tries to get inside the kabah and another thing to notice is that none of the guards in the pic is holding a gun or rifle etc etc. If it was that somebody is trying to harm the royal family the guards wouldn't be able to do anything anyway.