Brisbok
Cyril Towers (30)
Switching from league to rugby (and the other way, perhaps to a slightly less extent) is far more than having the right technical skills, athletic ability, whatever.
The motivation of the athlete, his genuine and altruistic reasons for making the switch, are far more important, IMHO.
Playing in the NRL, every second week at home, every other week not far away from home, is vastly different to being in a Super Rugby franchise, being in South Africa for a couple of weeks, and New Zealand for a couple of weeks, every now and then........not to mention the rigours of the international season, if a convert is good enough to make that particular grade. The NRL playing environment probably suits some players better than the rugby environment, and vice versa.
Players are clearly going to do better if they switch when they are young and single.
...and if the reason they make the switch is because they truly want to experience playing rugby and testing themselves in a different code rather than because they can earn more money which seems to be a popular trait among NRL players despite what they may say (read Karmichael Hunt, Folau etc.)