Although I see where you are coming from, I still believe that it doesn't matter who someone loves, that shouldn't stand in the way of them being a staff member if they really want to.
Another reason that I do not support this idea is because what about the people who are already together and are staff members? We can't force them to leave whoever they are dating! That would be just plain cruel, and if they have been a good staff member, why make them stop being one over them simply being with the person they love?
I understand what everyone who supports this rule is saying, but I personally do not support it.