Why do people become manchildren? Why do they read genre fiction and comics, play video games...

These high school sportsmen know about life more than weaboo retard though.

Kek

In what way does playing sports contribute to knowing more about life?

Drink

Normies jerk off to anime too, but in any case you shouldn't care about being better than an NPC (Normie) in The Simulation. You should care about keeping up with your non-normie brethren. Only the 10% fight each other in wars and ideological battles, the other 90% will just side with whoever is winning.

aha okay
>so he claims

Work, Chores like cleaning gutters and landscaping, farming, vehicle maintenance, woodworking, metalworking, recycling, volunteering, country club activities, Neighborhood Watch, jury duty, board meetings, church, raise family.

>Neighborhood Watch
aka a list of things you've heard adults do.

Plenty of highschoolers drink.
How does pissing money away and damaging the body make somebody less of a manchild?

It socialize you, make you more popular, it teach you team play, it teach you work hardly as you can, etc.