The reason why Autopilot is not ready for Primetime, stupid stories like this. The Autopilot did nothing wrong here though I am sure Tesla is working on an algorithm for hydroplaning. You can't engineer for stupidity. How much you want to bet this fool tries to sue Tesla.
This is why Tesla drivers need to keep their hands on the wheel on Autopilot - Electrek
"A Tesla Model 3 driver filmed himself crashing on Autopilot and it serves as a good reminder that Tesla drivers need to keep their hands on the wheel on Autopilot at all times.
When using Autopilot, Tesla recommends that drivers always keep their hands on the wheel and stay attentive at all times.
A Model 3 driver going by Dougal Vlogs on YouTube was driving on Autopilot while filming from inside his car with a handheld camera."