What looks impressive in a video is often smoke and mirrors. Just because your car is working in inclement weather for the duration of a video doesn't mean it's safe or that the behavior scales to all situations. Proving that it doesn't cause catastrophic problems is even harder (you need sim).

FWIW most autonomous cars work great at night. As for weather, nobody has heavy rain completely solved (yet) (afaik). It messes with both camera and lasers.