Honestly I don't know who Scott Aaronson is, so hard to say for me. And regarding that science cannot explain consciousness - it probably cannot explain it exhaustively YET. But this was the same with a lot of other things in the past, which were not explainable at some moment in time but were explained completely clear after some work has been done. So be patient, science will explain consciousness some day as well (at least I want to believe in this).