A resurgent Bottas qualifying better than Hamilton alongside an improving Ferrari and Redbull taking polls and wins can rapidly turn the final races from Mercedes high points scores into mediocre 3rd and 4th places - closing up Verstappen and potentially others in the points dramatically. Throw in a DNF or two for Hamilton... The season is far from over, and it won't take much to create some dangerous situations for Mercedes in the championships.
So, do Mercedes protect the championships in Hamiltons favour by throwing Bottas under a bus and have him allow Hamilton through at every opportunity, or do they let him race for points?
7 races left. So Valtteri can win every remaining race this season while Lewis finishes 3rd in every race, and Valtteri would still only tie with Lewis for the driver's championship.
But sure, if Lewis suffers 2 DNFs while Valtteri suffers none, and if Valtteri turns into God, then yah he can win the driver's championship.