Anime girls are female superheroes done right.

Their bodies are 10/10. And they generally have multiple body types for men of different tastes.
They're graceful. Maybe this grace might take the form of a clumsy girl who trips on herself before getting embarrassed, but in any case, they're a joy to watch.
They're affectionate in a distinctly feminine manner, and they're generally supportive of somebody.
They're humble. When they're not, this is treated as a flaw, usually for comedy's sake.
They're fun.
This is what people want to be around when they want to be around women.