You make a strong claim without anything to back it up. I don’t understand why it’s become trendy to deny that consciousness exists; to me it’s isomorphic to saying “We don’t actually exist at all. Prove me wrong.” It’s a vacuous statement, meant to sound evocative, but difficult to respond to in any meaningful way.

If I made a list of everything in order of how certain I am that the item on the list exists, consciousness would be at the top by far. Everything else could just be a nice illusion.