You are not entirely wrong. However you are also missing something. Defense wins championship. If you're going to argue that we need an All-Nba team player to win a championship, we also need an all-defensive team player
Let's look at team players on recent teams that won a championship. Each team have at least one player that made the All-Defensive team on their roster.
2000-2002 Lakers:
Shaquille O'neal - 2nd Team (2000,2001,2002)
Kobe Bryant - 1st Team (2000,2003,2004,2006-2011), 2nd Team (2001,2002,2012
Horrace Grant - 2nd Team (1993-1996)
2003 Spurs:
David Robinson - 1st Team (1991,1992,1995,1996), 2nd Team (1990,1993,1994,1998)
Tim Duncan - 1st Team (1999-2003,2005,2007,2008), 2nd Team (1998,2004,2006,2009,2010,2013)
Bruce Bowen - 1st Team (2004-2008), 2nd Team (2001-2003)
2004 Pistons:
Ben Wallace - 1st Team (2002-2006), 2nd Team (2007)
Chauncey Billups - 2nd Team (2005,2006)
Tayshaun Prince - 2nd Team (2005-2008)
2005,2007 Spurs:
Tim Duncan
Bruce Bowen
2006 Heat:
Shaquille O'neal
Alonzo Mourning - 1st Team (1999,2000)
Gary Payton - 1st Team (1994-2002)
2008 Celtics:
Kevin Garnett - 1st Team (2000-2005,2008,2009,2011), 2nd Team (2006,2007,2012)
Rajon Rondo - 1st Team (2010,2011), 2nd Team (2009,2012)
Tony Allen -1st Team (2012,2013), 2nd Team (2011)
PJ Brown - 2nd Team (1997,1998,2001)
2009-2010 Lakers
Kobe Bryant
Ron Artest - 1st Team (2004,2005), 2nd Team (2003,2006)
2011 Mavericks
Jason Kidd - 1st Team (1999,2001,2002,2006), 2nd Team (2000,2003-2005,2007)
Tyson Chandler - 1st Team (2013), 2nd Team (2011,2012)
2012-2013 Heat
Lebron James - 1st team (2009-2013)
Shane Battier - 2nd Team (2008-2009)
So far, we have two on our rosters who made the all-defensive team,Rondo and Bradley. One player that made the all star and all nba (Rondo). We have potential players that could possibly made it in the all-star (Green, Sullinger, Bradley and Olynyk and our draft picks). I'm trusting Danny for this one because he knows what it takes for banner 18 more than anyone on this blog. We have many assets to acquire those type of players for the next following seasons.