Why does everyone challenge those high difficulty battles over and over?

I only feel stress from having to replay it

Seems like they have fun doing trial and error with what they're given

I totally understand

I'm quickly learning what FGO is all about, Mash...

Isn't it your duty to understand FGO?

FGO? ahh, it's surely that smartphone game? Only people with too much time on their hands play it.

I don't understand what's so interesting about it.

You don't understand huh?

Then let this big sister give you a private lesson

Stop! You don't understand much either!