It’s only a scam if they’re being misleading. I’ve never heard anyone say “get an art degree, you’ll get rich!” It’s not a scam to study art simply because you want to develop your knowledge and talents in a structured way. Should art degrees cost as much as they do? Probably not, but “expensive” and “scam” are two different things.
The problem is that red light cameras incentivizes cities to encourage dangerous driving, because it is now a revenue source. Multiple cities have been caught illegally shortening yellow lights because shorter yellow lights cause more red light violations, yielding more money for the city and also increasing the rate of accidents at those intersections.