What's the value of the underlying implementation here? Is it just the ability to retrofit? From a user perspective, this is "you need to physically be in the

What's the value of the underlying implementation here? Is it just the ability to retrofit? From a user perspective, this is "you need to physically be in the car and scan your thumbprint or type on a keypad to start it"; it seems like there are lots of simpler ways that such functionality be built into a car by the manufacturer that are just as secure, it's just that there's no demand for it.