I agree but I would go further.
Our perception of the universe is that it is material, but what is matter. We perceive things as being solid or luminous but the reality, as far as I can grasp it with my extremely basic knowledge of QM, is that all matter is pretty much composed of tiny particles, vast areas of nothing and energy. The particles are so small that we don't really know what they are and we don't know what energy is.
It seems to me that the universe requires a conscious observer to perceive it in order for it to exist at all.
Everybody is entitled to my opinion.