They do have GPS dart launchers and other systems. They're fairly unreliable. It's difficult for the lead driver in a chase to deploy accurately and cars are typically dirty enough to make most adhesives ineffective particularly when deployed at highway speeds.

A hoodie is enough to defeat the drone surveillance, and regardless of what facial recognition technology you use, a jury still has to buy the output of that system.

For drones with less than a 6 foot wingspan that don't require a runway you've got maybe 30 minutes of flight time at a top speed of 30 miles per hour. So unless you know where they're going already you're not going to be able to effectively deploy it in the time necessary to capture them and you can't loiter long enough to track them with infrared.

The helicopter is an insurance policy. When you have a bunch of marked units doing twice the speed limit on a long enough chase they're going to hit something. Those crashes are devastating and lead to eye watering settlement amounts. The helicopter can safely chase most vehicles at almost any speed and the risk of them crashing with any civilian or even civilian property is effectively zero.