Hard Problem of Consciousness

I’m back reading David Chalmers again. His book, “The Conscious Mind” I purchased about ten years ago and have been dipping into it off and on ever since.

Why are we conscious if the brain is a machine, a computer? Why did a blob of matter, just basically meat, develop a conscious mind? Why was it necessary in a materialistic world? Isn’t the world strictly physical and ruled by the laws of physics? Of course. Well then, why was consciousness necessary, or was it just a silly accident?