This is probably a dumb layman question but as I understand it quantum computing makes use of the superposition principle in which a qbit can be in more states at once until it’s observed. A wavefunction has been described in a metaphor as if a person is missing in New York, the wavefunction describes him to be anywhere in that area, and when the police find him in Central Park the wavefunction collapsed. But if a wavefunction is not a physical object and a superposition only describes areour knowledge (according to copenhagenthe Copenhagen interpretation)of of the system how can it help with computing?