Measures against auto theft are well established to have brought down incidence of robbery, because it makes it harder to get a getaway car.

Measures against theft are driven by the market because car buyers don't want their cars to be stolen. Some incidental effect on getaway cars is nothing they had an obligation to provide.

And it's questionable whether that is even true, because anyone could just steal an older car or different make with no such anti-theft features, or use their own car and steal someone else's license plate.