Earlier quoted context omitted.
A strong hint this is the case is the fact that nobody can define consciousness.
Why would the impossibility of defining consciousness suggest that it's not a big deal?
Less facetiously: A debate of the importance of something needs a shared understanding of what is being debated. Without that, any discussion is merely people shouting that their belief is the right one, and the others are the heathens/idiots - because there isn't even agreement on what is debated.