Indeed - but have you ever actually done this?This is why wire coat hangers were invented. Another solution is to stuff a loop of earth sleeving through the hole, then drop the chain onto it.
I have, on a number of occasions, and I now have less hair as a result . If all one has is, say, a half-inch hole in the brick to work through, life is not at all easy. Indeed, if, as is quite often the case, one is dropping one's string/chain/whatever through the cavity from nearly two storeys above, it's a challenge in itself to get the string/chain to be anywhere near the hole below! ... or maybe you are much better at it than I am!
Kind Regards, John