someone playing music on their phone though the car audio (super common now) tapping the phone to ignore a call is just as much a crime as texting a novel to an ex.

They are all crimes. Set up your music before you go, or use voice command. Ignore the call with voice command or just let it go to voicemail. Lol. It's not hard.

And you are kidding yourself if you think almost every person driving for a living is not at some level forced to use their phone by their company (I was)

This is a great of the strength of this system: this company will find its drivers and vehicles getting ticketed a lot, and they'll have to come up with a way to allow drivers to do their jobs without interacting with their phones will moving at high speeds.

I would much rather have someone pulled over when driving erratically then the person getting an automated ticket 3 weeks after mowing down a pedestrian.

The camera doesn't magically remove traffic enforcement humans from the road. They can still pull over the obviously drunk/erratic driver.