If that were a truth then I'd always know what my wife is thinking or wants. Most of the time I have no idea.
Consciousness can't account for the wave collapse because it is believed here that it is immaterial; immaterial things can't by their nature affect material things.
In any case Kaku presents Wigner's Idealism as a valid interpretation that isn't disproven. Arguments against dualism aren't relevant here and can't settle the matter for the above stated reason.