Why are manga and anime more diverse than American animation and comics?

[VAMatt]

HomokHarcos said:

Compare that to American comics which is dominated by superheroes and animation which is dominated by comedy.

I don't think this is accurate.  As other have mentioned, you just have to look beyond DC and Marvel to find non-super hero comics.  There is tons of stuff.  

Animation - the stuff marketed to adults tends to be comedy, yes.  But, the stuff focused on kids is much more diverse.