After a certain point it's a language and population thing, and France has a language barrier compared to english.
That's not to say that it couldn't be random that a lot of the recent advancements happened in the US, I just don't find it likely.
In other words, the film makers are not subject to the market forces, they don't need to make something that the audience actually wants. The official stats of the PISF (polish state institute which funds movies) say that only 4 out of hundreds funded movies have recouped the state investment via tickets and other sales. The rests are flops, which is not a problem for anyone involved. That's how you get bad art.
I'm not attacking European universities and companies, I'm not arguing that there isn't any great research, I'm saying it's not a multiple of the US, which it really should be if "have a strong social safety net and the possibilities are endless" was true.
I don't that social safety nets play a large role - for most academics, researchers, engineers, artists, there's a de facto social safety net (via tenure, high income, patents, equity, stock options, grants, strong job security etc), so a general safety net doesn't improve their situation and output. And having a general safety net also doesn't by itself increase the amount of people of exceptional skill and/or ability.
I'm not against safety nets (though I do believe that we've gone too far and have created strong negative incentives), but I do believe that "our society will be like Star Trek" doesn't hold water. We have them, and our societies aren't like Star Trek.