You can steal a push-start car without the key.
Interestingly, many push-start cars are actually easier to steal than cars that require a key. While this depends on the year, make, and model of your car, a car that requires a key fob to start is a bigger target for thieves because they can use technology to complete a relay start theft.
This theft uses an app to amplify or copy the key fob signal within your home and then use it to open the doors and steal the car. Skilled or experienced thieves can steal your car in less than two minutes using this technology. And with no need to break a window, hotwire the car, or rip off the steering column, they’re much harder to detect.