Imagine that Chris instead of drawing just wrote it and put it on his site. I am not saying it would be any better, because Chris has shitty writing skills. However, I am going to argue that it may not be as infamous. The thing about writing is that you actually have to take time to read something to see how shitty it is, but with art all you need to do is look. So Sonichu might not have reached its meme status if it was just a written work on some random page of the internet. If he had posted it on Fanfiction.net it probably would have been lost in the sea of other shitty fanfics and sonic oc's.
Also he wouldn't have drawn ShecameforCWC since he didn't draw to begin with.