The whole point of the post is to make fun of a French product that has a French name. I'll even say that, further, they're (jokingly) accusing the producer of the product of knowingly using a name that sounds ridiculous to English speakers, which is a silly premise to begin with.

I'm not sure what the argument is, but the original comment simply stated that the joke only makes sense if you don't know French (I also don't know French, and it took me 5 seconds to find out that "la roche" means the "rock," so i realized oh they're making fun of how French sounds. It's not a particularly funny post).