I don't think anyone is arguing that they don't have benefits, I think the only question is do the benefits outweigh the detriments?
I mean, even though it's people's bad habit of tailgating that's to blame for the increase in accidents at traffic lights with red light cameras, if you can prove that statistically, the presence of the cameras is in correlation with an increase in rear-ends (compared to the drop in other accidents) then it's something to be considered.
There's two options in that case. Remove the red light cameras, or teach pepole not to tailgate. Unfortunately, since the latter is being taught anyways, and people are NOT listening, then the former option is the unfortunate choice.
You can blame rampant pregnancy on lack of sex education (and the data does support this) but you can't blame terrible driving on lack of education because no matter what you teach, people have their own ideas on how to drive and roll their eyes at the "safety nonsense" in Driver's Ed.
Believe me, I went to a decent school and there were three students in class who would derisively remark on anything related to safety or driving manners. One of them said that the only reason he was going to class was because he needed a license, but that he didn't need the education itself.
Same person who also tried to shut several students out in the cold, too, after the break was finished. Bully Jerk Jock type of person.