And Chad at 26 is the only one of those guys who's achieved anything. And he's still developing. They can play at 20, but they ain't winning Comps and dominating till much later.
to show you how stupid and short sighted your are... kyle flanagan will be 22 in 2019, but lets have a look at all the halves that have won a premiership in the last 16 years
2016 - Chad Townsend - 25 in the game, 20 when he debuted
2015 - Jonathan Thurston - 32 in the game, 19 when he debuted
2014 - Adam Reynolds - 24 in the game, 22 when he debuted
2013 - Mitch Pearce - 24 in the game - 18 when he debuted
2012 - Cooper Cronk - 29 in the game, 22 when he debuted
2011 - Daly Cherry-Evans - 22 in the game, 22 when he debuted
2010 - Ben Hornby - 29 in the game, 20 when he debuted
2009 - Cooper Cronk* - 26 in the game, 22 when he debuted
2008 - Matt Orford - 30 in the game, 22 when he debuted
2007 - Cooper Cronk* - 24 in the game, 22 when he debuted
2006 - Shane Perry - 29 in the game, 22 when he debuted
2005 - Scott Prince - 25 in the game, 18 when he debuted
2004 - Brent Shewin - 26 in the game, 21 when he debuted
2003 - Craig Gower - 25 in the game, 18 when he debuted
2002 - Craig Wing - 23 in the game, 19 when he debuted
2001 - Andrew Johns - 27 in the game, 19 when he debuted
2000 - Kevin Walters - 33 in the game, 20 when he debuted
so none of these guys have been over 22, and only one of them has won it in their first year
and, in 2019 val holmes will be 24, but was 19 when he debuted, so why is it good for him, but not for an actual half in our system?