Feelings are the messenger, not the message.
Thoughts, feelings, emotions, and all conscious experiences are just the messengers, not the messages. The message content is knowledge of oneself and one’s surroundings. The thoughts, feelings, emotions, and all conscious experiences, are merely the form in which that knowledge manifests itself.
There are many different forms of unconsciousness; unconsciousness seems to be a special type of mini-break in the physical continuity of a higher-level organism; the particular form of unconsciousness might depend e.g. on which anaesthetic drugs one has been given in a medical procedure or operation. But when one is unconscious, it is not so much the feelings that are blocked, but the higher-level executive-level knowledge of oneself and one’s surroundings that is blocked.
The content of the message, i.e. the knowledge itself, is the necessary aspect of consciousness.
The content of the message
The content of the message, i.e. the knowledge itself, is necessary because, when one is a higher-level organism, the physical existence of oneself and one’s physical surroundings, does not imply knowledge of oneself and one’s surroundings.
That is easy enough to say for higher-level organisms, but what about low-level organisms and low-level matter?
Low-level matter
Knowledge/ consciousness on the part of low-level matter, like particles, atoms and molecules, is also necessary because the physical existence of low-level matter does not imply that the underlying real-world mathematical system has knowledge of the necessary details of the low-level matter and its surroundings. I.e., existence does not imply knowledge of existence.
Low-level matter, like particles, atoms and molecules, needs to know their own physical selves, and their physical surroundings. But this knowledge is in terms of the categories like mass and position, the relationships between the categories, and the numbers that apply to the categories.
Consciousness is a separate, necessary aspect of the world
It is only when one considers the necessity for knowledge/ consciousness on the part of low-level matter, that one can see that knowledge/ consciousness is OF the physical, i.e. knowledge/ conscious is NOT the physical, i.e. knowledge/ consciousness is a separate, necessary aspect of the world.