Like taking things out of context?
The reason why I wrote that is that you equated two things:
Something a company can do easily to a reasonably high degree and something that is just on experimental status now. Further geolocation techniques have been in use for quite a long time by Google itself.
Can any web company company today easily do geolocation on web services reliably enough to block 90%+ of such request: Yes and they have been able to do that for more than a decade and has been widely used for other things.
Can any automotive company today do speed limit detection well enough to stop speeding in 90%+ of such cases: No. It is a technology that is "almost here", that is it is available on certain models of certain car brands but has not had any wide deployment.
When the second technology has been in wide use for more than a decade, ask if car manufacturers will be liable to have the technology in all cars then. My guess is a yes.
As for fines: No, The French do not want Google to be liable for the thing their customers use, but they do want Google to actually do an effort at blocking that illegal use.
In the same way I do not think the car companies will be liable for the fines, but they will be liable of they did not do an effort to stop such once the technology to do so is commonplace.