Yeah, but everywhere in sport I've seen an iconic jersey, it ends up with the weight of pressure pushing down horrendously on a single player. The media tell us that certain shirts mean more than others - to a point that's true of #10 everywhere in rugby - but I'm sure no-one in Wales would be happy if they had 14 crap players + 7 crap substitutes and a genius at #10.
I believe part of the make-up of a truly successful team is a sense of collective responsibility. (which imo accounts for much of Wales' recent success because I doubt Gatland/Edwards are seduced by the romanticism) Too often, I've seen teams across sport simply wait for a star player to do something, or someone in a 'special' historic position.
I think the most important thing in playing for an international rugby team should be the feathers/rose/thistle/shamrock/cockrel/springbok/puma/wallaby/silver fern on the front of it, because an international shirt is also both an honour and a burden, and singling one player from a team out makes their job ten times more difficult. If they're all equally in the pressure cooker, the pressure is shared.