In the best of all possible worlds, of course, those making strawberry would not call it chocolate, and the creation of strawberry wouldn't put chocolate out of print. Nor would anyone believe that strawberry is chocolate.
The best of all possible worlds is not about everyone agreeing, and having the same opinion. Quite the opposite - everyone agreeing is boring, and boring is clearly not 'best".
The best of all possible worlds is about how people deal with each other when they don't agree.