One for the highly cultured anons who work hard and strive for anime perfection, and then a second one for the inferior baboons who prefer the muddy and tasteless styles cultivated in the west.
Here's 5 legitimate reasons as to why this is necessary:
>the former group actually draws, the later only comes here to shitpost
>the former group actually strives for something, the later only comes here to shitpost
>the former are more civilized, the later act like this is a second /b/
>since the anime aesthetics group actually draws, they come up with constructive and valuable information as opposed to the other group that can only shitpost and spew senseless fallacies
>the anime group is more in line with the true spirit of 4chan while the other group is conformed by shitposters who shouldn't even come to this board in the first place.