Yes so? Its not cheating it’s helping :)Imagine playing skywars and making a trap if you have no other option. If someone's ghosting for their friend, they'll know where the trap is and they'll tell a friend exactly how to avoid it although said person wasn't even supposed to know about the trap's existence.
Giving away positions of players could also be pretty unfair in certain scenarios.
It really comes down to how you look at it to be honest.