Yes, quite so, but what we see in the episode (peeking from under those leather covers) appears to be a single-piece bow. No "joining" involved. Since that (probably) ain't cast polymer or spun fibers in the Trek reality, it could be an intact antler that loses all its advantageous tensile properties if cut to pieces and rearranged.
http://tng.trekcore.com/hd/albums/3x04/who_watches_the_watchers_hd_204.jpg
That is, the hunters yank this thing off the forehead of a dead beast (I'm postulating a double-ender with the nexus connecting to the skull, rather than two individual horns), and then file it smooth and into shape, to some degree, especially around the grip. But they can't alter the basic shape.
Timo Saloniemi
http://tng.trekcore.com/hd/albums/3x04/who_watches_the_watchers_hd_204.jpg
That is, the hunters yank this thing off the forehead of a dead beast (I'm postulating a double-ender with the nexus connecting to the skull, rather than two individual horns), and then file it smooth and into shape, to some degree, especially around the grip. But they can't alter the basic shape.
Timo Saloniemi