A loophole is also a small window in a wall, used to shoot arrows or bullets through. Closing it prevents the enemy from doing the same.
Of late, I've been acutely aware of language and how we use it ... not trying to get into a pissing match, just pointing out the obvious.
Example;
In the store, the clerk says, "That'll be $29.95" and I ask,
"OK, but what is it now?"
The machine asks; "Is $29.95 OK?", and I counter,
"How would I know?"
etc.