Yes, and the reason is a nuance worth stating plainly: in California you pay the fine no matter what. Roughly $234 all-in on a typical ticket once the state stacks its penalty assessments on the base fine. Traffic school never touches that number. What it touches is the far bigger one.
California insurance runs high, and our data puts the three-year exposure on an unmasked ticket at roughly $5,385 as a ceiling estimate, driven by one of the steepest premium-increase percentages in the country. Masking the conviction, which is what traffic school does under VC 1808.7, keeps the ticket confidential and that exposure unrealized. Your cost for the masking: the court's administrative fee, about $52 to $55, plus a course that can run under $10 in California's hyper-competitive market. Call it $60 to $90 total. Against a $5,385 ceiling, that's a return on the order of 60x, and still excellent if your carrier's real surcharge lands well under the ceiling.
The conditions: eligibility per your court notice, once every 18 months measured violation date to violation date, no commercial licenses. Inside the 18-month window the answer flips to no; you'd be buying a course whose benefit can't apply.
DMV-licensed schools are compared on the California page; the fee stack is on our cost page.