And likely they have the key fob codes as well so they can simply unlock them and drive them away. Don't even need a tow truck.
When we go to self-driving cars, they will just drive themselves back to the leasing company.
I dont lease but no one gets my cars. I remove a key component under the hood. I learned this in the 70s while living in Los Angeles. A couple of times I came out to my car with a dead battery and the doors left open. But they couldn’t start it without a distributor rotor. Lol.