Most people drive to work and use their vehicles to take care of necessary things, such as shopping, seeing friends, handling family responsibilities, or going to school. In other words, people drive vehicles because they need them to get from place to place, and in a context where many cities or towns lack robust public transportation, people will use their vehicles to get from one place to another.
Not too surprisingly, most people do not desire to be stopped when driving their vehicle for some imaginary infraction, and so especially take reasonable offense when they are pulled over, for apparently no good reason, but subsequently receive reason enough from the police officer, that they were, for example, driving above the speed limit, or failed to signal their intention to change lanes, or failed to signal to make a traffic turn, or didn't come to a complete stop, or the tinting on their car window appears to be too dark, and the list goes on and on, because basically anybody at any time can be pulled over, because police officers are adept at finding some pretextual reason for a traffic stop, and are going to do so, when it is their wont to do that very thing.
It would be one thing if everyone was equally subject to being stopped by the police, from rich to poor, from white to black, from young to old, but in actuality, study after study has found that it is those that are poorer, those that are not white, and those that are younger, that are pulled over more often, which makes it fair to assume that police officers are targeting certain people in certain situations to be pulled over, and when pulled over, thus permits those police officers to basically investigate what they desire to take a look at in regards to the person's identification, and what they visibly see in the car, along with asking questions, or doing a more investigative search of the person and vehicle, in which, for the most part, in most situations, those that have been pulled over, don't have much choice except to comply with the officer's instructions, because they are typically cautious in considering other actions consistent with their Constitutional rights, for they don't want matters to get worse.
The problem with pretextual traffic stops really comes down to the fact that it is impeding citizen's ability to simply drive from one place to another without being stopped for some bogus reason, which makes it to be a situation in which, just like yesteryear, it's pretty much "your papers please," which seems to reflect that in the United States, as much as the people take pride in the belief that they are free and hence are at liberty to be about their business, this is contradicted by the fact that while driving on the roads of America, they are unequally subject to being stopped by a police officer, who then proceed to nose about their business, and hence for those police officers to effectively work as an instrument to impose "order" which makes for some to be far less free than others, which isn't fair or right.