Because sport is a hobby, people initially start playing the game for enjoyment, not to undertake it as a ‘profession’. Hence professional sport needs its own legal employment framework, as it comes with inherent risk.It being "voluntary" is such a weird wording.
Surely most people voluntarily choose there career or life choice in some fashion.
In a legal sense, I think it's incumbent on all employers (including the NRL) to ensure they are taking all reasonable steps to protect their employees. There is no need to create shelf companies or have players sign their lives away.
Rugby League is certainly not the Lone Ranger in terms of this issue.
It’s like suing the Armed Forces for getting injuries in the battlefield.