Agreed. First time I realised how important this was is not long after I passed my test. Coming out a giveway there was a grey car coming from my right, with it's sidelights on, rain wasn't that heavy. First time I looked right I didn't see it. Luckily I checked again before I pulled out cos if I didn't I would've crashed
I think you only appreciate it when it happens to you
I also think car makers with auto wipers should make the headlights come on when the wipers are a certain speed