Panpsychism to the rescue! :p
On the other hand we have a hard time even defining consciousness.
Perhaps "the self", or "the idea that I am a being with a consciousness separate from all the universe" is an illusion.
It seems to me that you’re defining consciousness as having thought (please correct me if I’m wrong). I’m ok with that, but I think at a minimum you’d have to agree that any creature is capable of having thought and therefore possessing of consciousness. If not, let’s say you’d argue that an ant is just reacting to chemical signals, I’d just say the same is true of humans.