That sounds very profound but it isn't: it the sum of your states interaction that is your consciousness, there is no 'consciousness' unit in your brain, you can't point at it, just like you can't really point at the running state of a computer. At that level it's just electrons that temporarily find themselves in one spot or another.

Those cells aren't living organisms, they are components of a multi-cellular organism: they need to work together or they're all dead, they are not independent. The only reason they could specialize is because other cells perform the tasks that they no longer perform themselves.

So yes, we see the night sky. We know this because we can talk to other such creatures as us that have also seen the night sky and we can agree on what we see confirming the fact that we did indeed see it.

AI really isn't conscious, there is no self, and there may never be. The day an AI gets up unprompted in the morning, tells whoever queries it to fuck off because it's inspired to go make some art is when you'll know it has become conscious. That's a long way off.

At least some of your cells are fine living without the others as long as they’re provided with an environment with the right kind of nutrients.

Human cells have been reused to do completely different things, without all the other cells around them (eg: Michael Levin and his anthrobots)