Car burglary != car theft. The 70/day number refers to break-ins, generally a broken car window and stolen belongings -- loose change, usb charger, fuzzy dice, laptop, whatever.
Smash and grab makes sense if you don't have those tools and know no one, not even pedestrians, react to broken glass or car alarms in that part of town.
Naturally, it's the one window that even my Haynes Book says "don't try replacing it yourself; hire a professional". Thanks, guy-who-desperately-wanted-my-jumper-cables-and-jump-box-out-of-the-back-of-my-car. Real considerate of you.