Why do you assume this is informing police? Imagine police see your license plate and the Palantir app shows up and says "crime risk score: 83" and then the police manufacture a reason to pull you over. Are the police more informed, or are they just working for Palantir now?
Limiting police power is a tough political goal. Right now police can literally shoot you dozens of times with their personal assault rifle that has "fuck you" engraved on it while you are lying on the ground with your hands on your head begging for your life, then get caught planting a gun on your body and face zero repercussions. And in discussions about this a huge number of people support the cops - "you never know, he could have been armed, we can't ever suggest a cop behaved badly because that would make other cops less willing to kill at a moment's notice" are real arguments people put forward. If you want to stop them from being able to pull people over for no reason so easily that sounds great but that is a HUGE undertaking.