The Great Ruck Debate.

[DJC]

The people against the '1 ruck' team lineup do so because they are worried about injuries, specifically an injury to that ruck.

That's one consideration but not necessarily a compelling one.

It's more about fielding a team that is best equipped to beat the opposition.  That team could have one ruckman and a competent part timer (not Matt Kennedy) or two genuine ruckmen, at least one of whom should have more than one string to their bow.