Ohhh.
But still, japanese have probably made an anime about every possible subject out there, and they're not all deep and dramatic, long stories. There's also a lot of those shorter, humorous and/or childish ones (the ones others than japanese adapt first among their television programs.)
Part of western cartoons aren't purely for adults either, Animaniacs for example. I watched it when I was a kid but didn't get most of the jokes since they were so indecent.
And when I watched it 10 years later I noticed they weren't even meant to be understood by kids, but adults.
I know what you mean about the difference in audiences though. Many western people seem to have strong prejudices about anime. I've seen Berserk being sold in kids' shelf and when asked what the hell it was doing there the seller answered "It's a cartoon." Yeaaaa but it's K18 and there's lots of blood and killing and demons and sex and internal organs...
But yeah, I'm aware of the cultural differences. I was thinking more about the technical side of making cartoons and all of them being animated cartoons / animations / animated films despite of their content, style or message.