Yes, I assumed as much. And technically this is not a website for me. It was a request for a site that I finished sometime ago, they wanted me to add this, if it were up to me, I would leave it as is with no sounds.
Usually am able to fix all my own problems, but I've never actually added onclick sounds, (because of the excellent reasoning that you gave and that I agree with) hence why I was a bit stumped looking for a workaround. I might just let them know it's a bad idea.