In the UK no one will cross a red light to let an ambulance/Fire Engine/Police Car through. Often in the news you read stories of emergency response drivers being summoned to court for crossing a red light or speeding through a camera. They have to prove they were on a blue light job. Same is happening here.
As for a true emergency in Doha, if my wife needed to get to a hospital fast I really wouldn't be concerned about fines, her health would come first and I would fight the fine in the courts.
Why the concerns about speed cameras? Simple DON'T SPEED.

What about security tag detectors in shops? Are they justified? Takes away the fun of stealing goods! It's all the same thing. Obey the law and you have nothing to worry about. Ranting about locals doing what they want, well let them. We are not the police or judges.