True. One other interesting point about the "trial de novo" mechanism, in states that have it, is that the judge in a de novo trial can sometimes (in the case of a conviction) impose a harsher sentence than what would have been possible in the original trial. So invoking that right, even when you have it, does entail some additional risk as well.

That, along with the sheer inconvenience, cost, etc., is probably why few people bother doing this for traffic citations. It's easier to just pay your fine, accept the increase in your insurance premiums and go on your merry way. :-(