but if you're going to help White to better moves, then you have to help Black to better moves too
Not at all, because right from the beginning I was arguing that:
IMO, sicilian players at the lower levels need to choose between spending twice as much time as their peers studying openings (to learn a line against all of white's sidelines) or they can play without theory and should be ready to lose lots of games where their opponents didn't even have to think for themselves the whole game and just 'rinsed and repeated' the same trap they have used 100 times.
A scandinavian or modern defense player could probably play 1000 games and never lose like that once, but it happens all the time in the Sicilian, even at my level.
You are skewing it by making it bad play by black vs good play by white instead of considering either most common play by both players or best play by BOTH players. Or your argument that it's harder for black doesn't make any sense. In the most common moves, white is also having difficulties finding the best moves and is often not doing so, so white isn't struggling any less so than black.