These keyless systems enable these cars to be broken into really easily. I’ve had friends see thieves operate in pairs, one by the front door, one by the car, and effectively use repeaters between the house and the car to unlock his Range Rover, and then drive away with it, in under a minute (as captured by his home security system).
The question then becomes more of a value proposition / opportunity cost. If you can steal any keyless car trivially, why wouldn’t you target the vehicles that can net you the greatest return?