Whatever happened to a simple LEGAL traffic stop?

Why do cops require a driver once pulled over to exit the vehicle, hands where they can see them, interlocked fingers on their heads, walking backwards, then get on their knees?

I get that cops have been killed during some traffic stops BUT not by the average person being pulled over for a non-violent crime.

I've witnessed hundreds of people handcuffed on the side of the road with at least 4 squad cars there while searching the car for whatever purpose.

Why are people treated like that?

Where have their rights to unlawful searches?

Miranda?

No wonder people are terrified once the red & blue lights get turned on behind a car, I know I am.

After finding out WHY I was pulled over I'll tell the cop that I have a concealed carry permit and that my loaded gun is in the console as soon as they approach. I know that I've done nothing wrong, other than perhaps a minor traffic violation.