Resting linked to difficulty levels.
Certain areas which limit resting/ fast travel.
Certain achievements linked to resting.
Certain quests/ outcomes are time sensitive.
Too many long rests = became a mindflayer (not for easy mode but otherwise possible).

Any and all could be considered but I still find it interesting we had difficulty levels in DOS2 EA but not BG3.

And I don't think EA will be "easy story mode" but closer to "standard" difficulty setting.