Why is some software SuperMarioBros and other Microsoft Word? 'cause that's what the specific software is written to produce and the other is written to do produce else. Consciousness is not some magically thing on top of a information processing, it's what that specific bit of information processing produces. It's functional, it does stuff.

It should be kind of obvious due to the fact that we are conscious about our human self, not neurons, not brains, not microtubules or any other random implementation detail. We have zero clue what is going on in our brains, but we do have a high level description. Just as our brain can take some random electrical impulses from our eyes and decide that that's a "cat", it can take all the other input that goes around and conclude that that's a "self". It's perception, the brain trying to figure out what parts of the world it has direct control over.