Pyramid Example in LftP

[Brigandier]

I think what it means is that Casuals will find it less of a stress to do any content that hardcore can do, but the hardcore players can do more of it.

How is that any different? Part of the reward of being a hard core player is being able to do things other people can't do. If you take away the content that requires the elite to win, what point is there in becoming one of the elite?