This misunderstands the "hard problem" of consciousness which for brevity's sake I will just pose as the question "why does the universe exist at all?"

Sure, we don't know that answer. Probably cannot without an impossible machine that can observe all states of all particles and matter throughout all of time space.

Occam's Razor allows for a simple, good enough definition to satisfy day to day concerns on Earth; consciousness is a feedback loop of sensory information and mechanical body response.