That is because consciousness isn't a scientific concept but a philosophical, and sometimes religious one.
>What we're really looking for is a machine that, like a human, decides on its own which problems to solve, and solves them without needing to be specifically directed to do so.
We already have AI based agents that do this but no matter how sophisticated they are people can always claim they are hardwired and deterministic, while not realizing we can always claim the same thing about humans. Again these are distinctions of philosophy word games and therefore don't find get much traction in the research world.