As mentioned earlier, several of these Rules of Engagement go back well into the George W. Bush days and do make sense. We are not there as conquering heroes, we are there attempting to buy time for the Afghanistan government to stabilize and be able to take over their own security.
Yes some of the rules are pretty outlandish. But these are rules that make the Afghanistan people/government appear to be in control. These are rules that have been signed off by our politicians - both Republican and Democrat. It falls under the category of diplomacy. Whether they have been wise is something else altogether.