It's not ease, it's efficiency: opening a locked car door is 1-2 minutes for an experienced person. Smashing the window is 2 seconds (though you also need some experience, as modern car side windows are also laminated).
Look up LockPickingLawyer on YouTube. Less than a minute with the right tool.
https://m.youtube.com/watch?v=iWWWyG5ZwG8
The lockpicking lawyer’s skillset is not what’s required for that task. 30 seconds would be an eternity for a typical thief to just be able to open a car door. Most of these thieves take maybe 15 seconds from approach to escape. Stealing a whole car is a little bit different but nobody is going to sit there with their adrenaline pumping, wearing gloves, in the middle of the night trying to pick a car door lock that won’t even disable the alarm.