Why French court? If other countries don't ban them, France will just be hurting itself.
Even still, if the EU chooses to regress, I can imagine a lot of non-EU-based companies—especially smaller ones—just choosing not to deal with them anymore
EU would ban any technology that disrupts the labor market to an extent it leads to widespread protests among a segment of society. For how a somehow similar thing has played out in the last 40 years (instead of banning technologies, it has mostly been instituting quotas, paying subsidies and banning/taxing imports), you can look at its agricultural policy.