I don't think that makes much sense, it's probably better for them to sweep their opponents because then they might think the Grand Line will be similar, get clapped, then realize "Oh, shit, they're not playing around here, we might really die if we don't start taking things seriously and bettering ourselves", and that's what makes them start to improve and get progressively tougher along the way.
It was cool to see but I’m not sure how the global audience would feel if the heroes we follow just curb stomp everyone for the first 2 seasons
