You miss my point. The point is that you may have to set a policy that is more restrictive than you would ideally like in order to prevent abuses.
Do you know what the policy is now? Do you know how restrictive it is?
If not, then how do you know it’s not good the way it is now? If you do know the policy then tell us what it currently is.
I can tell you from what I have heard from the military folks talking about it, it is very selectively used, it is used on a very small percentage (in the 1-2% range) of people, the people they select are because they are known to be high ranking folks who have a lot of info, or key info - not the run of the mill average terrorist fighter. My primary source for this was believe it or not, a Charlie Rose interview with a US general (also a lawyer) who was involved in this process in Iraq for several years and was involved with developing this policy. Over this time they refined the process and refined the selection process so that it would only be done on the potentially best candidates for info.