Not sure how the DMCA prevents people in boats from hijacking ships, but your view isn't of any relevance, what's of relevance in France is France's view.

The DMCA allows people in non-US countries, working for companies in non-US countries, who have broken no law in those countries, to fall under arrest if they accidentally get into U.S. jurisdiction.

So when complaining that people in the U.S. who don't break U.S. law, may be prevented from doing business in France if they've broken French law, think back to what you sewed 20 years ago when the FBI decided that U.S. courts had global jurisdiction and arrested foreign citizens for not obeying.

The age of American exceptionalism is over.

The DMCA DOES stop free speech. It's not just illegal to violate copyright, it also makes it illegal to tell people how to circumvent DRM!

But the DMCA regularly gets used to stop speech.