My point being is that the players around Nash are pretty talented and can play well even if Nash is not in.
Phoenix record in 2003-2004 season, roster included Shawn Marion, Amare Stoudemire, and Leandro Barbosa, their coach was Mike D'Antoni (year before Nash):
Record: 29-54
Since Steve Nash signed with Phoenix in Summer of 2004 (spanning 04-05, 05-06, and 06-07 seasons):
Record without Nash: 4-12
The players around Nash are talented but I have to wholeheartedly disagree with you and submit that it matters a GREAT DEAL if Nash is not in.