It may be true now, as modern block buster lipsync is atrocious (at least in France). But 20 years ago people cared a lot about it.
I remember distinctly this wonderful line from the 5th element:
- Are you classified as human?
- Negative. I'm a meat Popsicle!
Which they translated to french into:
- ...?
- Negatif. Je suis une mite en pull over !
Which has not relation at all to the initial line, and literally translateds mean "I'm a moth wearing a sweater".
But it's equally nonsensical, definitely as funny, and the beautiful thing is, the lipsync is near perfect.
However it's a lot of work, requires very talented people to achieve, and is mostly useless in the eyes of the right owners: money will come anyway if the movie is average, so why bother making it better ?