Deaf people don’t have a choice not to hear and have heightened visual awareness. They also have accessibility tools to assist and bridge the gap in awareness.

My driving instructor also taught people with various disabilities. He said with deaf people the examiners pay special attention to how much they look around.

He also told the story of a guy with only one leg who really really wanted to ride a motorbike. The examiner made him stop at an incline dozens of times to make sure he always managed to fall to the side with his good leg and that the leg was strong enough to always hold the bike.

Yes they are, and that's an entirely different situation.

People who are deaf have learned to work with their disability, and reduce the inherently increased risk of not having auditory cues -screeching tires, honking, emergency sirens, etc. That is a life skill for them.

OP, on the other hand, was asking about whether it was dangerous to voluntarily block out those cues in a situation which is already moderately risky (driving), and implicitly is someone who hasn't developed the compensating skills.

The question was 'is it dangerous?' It absolutely is, as well as stupid and in some cases, illegal.