What the exact error rate is isn't relevant to OP's concern, which is that operators of the tooling will treat it as having a 0% error rate in a way that they don't with human judgment. We've already seen this play out with algorithms designed to predict recidivism or what have you—law enforcement and judicial officials place undue weight on the outputs of algorithms and trust them implicitly where they might ask questions of a human expert.
> which is that operators of the tooling will treat it as having a 0% error rate in a way that they don't with human judgment
This is possible but we have decades of camera enforcement experience suggesting that courts are aware that these systems are not as reliable as the manufacturers claim. People have been challenging photo tickets since the previous century and there’s a well-established process for challenging them.