The belief that reality cannot exist without mind assumes mind to be larger than reality itself. As if there are two realities: the reality of consciousness and the larger reality of mind.
Upon contemplation, we realize that mind (thoughts, sensations and perceptions) is an appearance within consciousness. Consciousness appearing within mind is a belief and a misunderstanding about consciousness.
Consciousness being the reality of our experience. As Francis Lucille says: the reality that perceives these words.