... news at 11 :)
Look at it from their PoV: the French have a law, and their civil-code attitude to the law is to enforce on principle, not to the letter as English common law. Loophole closing rather than toleration (which might be applied wholesale to certain violators.)
Some well-intentioned person probably argued against RTBF by pointing out that VPN bypasses geolocation. So the Prosecutors were informed and instead of abandoning an impractical (if not stupid) law, they figured out how to close the loophole.
Les procureurs [correctly] figured they could not stop VPNs, but Google was there for the muscling. Like all impractical laws, even worse measures are required for enforcement (eg.drugs).
It will be interesting to watch. The French and EU courts could go either way. At one extreme it is an act of war (blockade) and the other Google leaves France. Most likely a deal for a hidden something France wants.