I read it as....
The "advantages" of picking a team early so they could play practice rounds together on a "similar" course would not be equal to the advantages he feels he would get if he waits to pick his team based on player form.
It would be no different if playing at ANGC, Medinah, Shinnecock, or Pebble Beach, or Bellerive.
By the "real thing" he means the actual course the event is being played on.
NGLA is not some shrine that the GB&I team worships at, anymore than the probably the younger US team members do.(hopefully after the event they'll have a stronger appreciation of it)
You can play all the blind shots you want with fast undulating greens, but if they're not the blind holes or undulating greens used in the event,so what?, so i think he's saying what's the point of "preparing" for the site elsewhere, when we can simply add a day at the actual site, or real thing
Ironically, if you wanted to pick apart his words to find something, the one thing they are most unlikely to find in the UK/Ireland, is the type of green speed/undulation they will find at NGLA, hardly a property of traditional links golf.
Perhaps they should prepare at ANGC.