Of course it's relevant to how it's seen today. French culture nurtured the author, a French publisher published it, and France didn't ban it while other countries did. This is all evidence that the book was well-liked in France when it was published, and there's no reason to think that would change over time.

If anything, it's surprising that English-speaking countries like it so much.

I disagree, those aren't relevant factors. Just based on those facts it's possible there was one sponsor in France who published the book and then it bombed, never to be read by a significant amount of the public. That it wasn't banned is normal in a free society, but also says nothing about its popularity.