I don't see why manufacturers can't program a "wipers on (or active with autowipers), lights on" into the car. Yes that's even more reliance but it'd stop this.
Some cars do - if the lights are on auto on my Qashqai the auto wipers will trigger them but for some reason only after 5 passes at the higher wiper setting which is almost never required for most rainy conditions.
.
) biker I couldn't agree more. If the traffic is crawling then filtering is fine when it's safe to do, but if the traffic is doing the speed limit there's just no excuse.