Why do you keep bringing up Spa as if that helps Lewis's case? Max was on pole there. Lewis was third, out qualified by Russel in a Williams. If there was a full race, chances are Max would have scored even more than the half points he got.
I know your reply is going to be something dumb like Max would have crashed - but math says otherwise - out of the 5 wet weekends this season, Lewis crashed on 2 of them on his own. Max 0.
Aside, I thought this year, a number of other drivers outperformed Lewis in the wet, which was surprising to me. An article on wet race performances this year -
https://www.sportskeeda.com/f1/ranking-5-best-f1-drivers-wet-conditions-2021