This has been mentioned several times:
- Why don’t whispers heal you?
- Fast travel to all whispers, whispers should heal you
- Bug: whispers don’t heal you
- Healing, Stamina, & Last Whispers
- Please add ability to heal up when interacting with a whisper
Now, if Whispers, would heal the player it would partially override the need for food and cooking. Players would not waste food on healing during trash fights since enemies don’t respawn so dying is a free reset. This makes healing items next to useless outside of boss fights.