I figured it out. The hardcore love toys and stories, casuals love games.

[Pyro as Bill]

RolStoppable said:
The hardcore don't like to lose, that's why. That's also why they love achievements so much, because it makes them feel like they have accomplished something great for beating the first level.

They are like a little child playing with their toys and making up their own rules, so that they can always be the hero and win. And just like a child, they get angry when you point out that they only win, because they set up the rules in a way to make themselves winners no matter what happens.

The entitlement to finish video games didn't exist back in the day. Nowadays it's omnipresent.

Casuals don't like to lose either. Given the choice though, they'd rather lose against a real person than 'win' with a toy.

Achievements are the equivalent of a parent emphatically clapping when the child does something 'special' that really isn't that special at all.