but most of the anime, at least main stream anime doesn't come under seinen and i never quite understood this point.
shonen anime ideally shouldn't have too deep stories if it's good kids but that's not happening
Idk what you’re trying to say.
The labels are super arbitrary entirely based off of what magazine it was printed in. Most magazines cater to one of 4 demographics:
Shonen - young boys
Seinen - young men
Shojo - young girls
Josei - young women
These labels don’t have any deeper meaning, as that’s just what the word means in Japanese. So saying shonen manga basically just means “manga for boys”. Anything else is stuff non-Japanese fans have fabricated based off of misinformation.
So if you see a magazine called SHONEN Jump, every manga in there is going to be shonen, and has zero relevancy to the genre.
I shit you not, you can buy a copy of Shonen Jump and read One Piece and directly after it is a romcom anime.