That may be true, but it's also an objectively superior tool. A master swordsman might be more effective with a wooden sword than an apprentice would be with a metal sword, but that doesn't mean that the swordsman would reach for the wooden sword when the metal one is readily available. The Jedi I can 100% believe using an objectively inferior tool because of tradition reasons, but the "grab any advantage possible" Sith? Eh, not so much.
But, ultimately, Star Wars runs on rule of cool, and it's by far not my biggest nitpick with the series.