Before asking why the loopholes are there you should ask why the laws are there, then you can ask how the loopholes fit into that purpose.
Speaking as an Orthodox Jew - We believe the laws are there because particular actions affect the universe in ways we might not understand but that the creator does. It's like the instruction manual that comes with a machine. (If it was something we could figure out for ourselves we wouldn't need to be given the laws from on high.)
So it follows that if there is a loophole, in a law given by an omniscient God (i.e. there is no argument that He didn't think of it), it's because following that loophole does not cause the spiritual damage to the universe that breaking the rest of that law does.
Obviously some of you will argue with some of those axioms, but as stated by WJW elsewhere in this thread, this is about people who have already accepted the axioms.
I should add that there are those who study how each thing affects the world - that is the study of Kabbala.
But you don't need to know it to accept the idea, just as you don't need to know how a machine works in order to use it, as long as you follow the manual.
Speaking as an Orthodox Jew - We believe the laws are there because particular actions affect the universe in ways we might not understand but that the creator does. It's like the instruction manual that comes with a machine. (If it was something we could figure out for ourselves we wouldn't need to be given the laws from on high.)
So it follows that if there is a loophole, in a law given by an omniscient God (i.e. there is no argument that He didn't think of it), it's because following that loophole does not cause the spiritual damage to the universe that breaking the rest of that law does.
Obviously some of you will argue with some of those axioms, but as stated by WJW elsewhere in this thread, this is about people who have already accepted the axioms.