The point being that soccer still manages to run a professional national competition despite having only modest support. Same with basketball, netball, rugby union.
Rugby league is a much more popular spectator sport than all these. NRL2 second division could get similar crowds and tv viewers to a-league, NBL, super netball, super rugby.
No it couldn't. 2nd division would be same size as NSW & qld cups. Will always come off as secondary & less important.