Sadly enough, it is mainly because their extreme frontrunner have diverged much harder from reality than the other fandoms…
Zoro was simply the #2 of the strawhats and somewhere inbetween YC1 and low top, but the most vocal pushed hard for stuff like „he would one-shot X top tier with KoH“ or „how could Y take him down when 2 yonko with hakai couldn’t?“ and now KoH was no sold and he is down for the day after jellybean equivalent projectiles…