I don't think that's a good assumption. 80k is rather high for Paris. That's a Google salary at their small office there (or it was when I checked a few years ago). I think the OP's comparison was pretty reasonable.

Of course, But 80k is on the high-end for Paris as well. And most companies in France, even in tech, except maybe the few international ones like FANGS or Datadog, explicitly want French speaking workers, whereas English is enough for most US jobs.

I'm EU citizen and looked towards working in France even for the lower wages, but the French language mandates are really off putting. I'm willing to learn the language, but I'd need at least 2-3 years and it's just not worth it for average Europor wages I can get with just English and my mother tongue in EU.