Just to steel man the argument, I think what the parent might mean is that when you move from something that used to be physical security only (a regular key) to something that is now both physical and over radio, or worst case radio only, you are introducing a new medium and because of that you're also introducing a lot of new attack vectors and vulnerabilities.

Presumably the argument is that the benefits you get from this new medium being introduced (being able to unlock your car from a distance) can be argued to not be useful enough to warrant the new issues it brings along with it (verifying the authenticity of the transmission, avoiding jamming, etc.), and one can argue that the Flipper Zero is shining a light on these issues in a new way: they have always been there as fundamental parts of the choice of the radio medium, but they are now easier to exploit.