I'm certain their implied tasks include making their tackles and holding onto the ball.
Or do you think they're told otherwise?
In all honesty, do you think that we make more errors than any other club in the comp?
Canberra missed more tackles than we did, but they still held their marbles together well enough to beat us.
The big problem the team is facing is (a) inability to respond to adversity and (b) lack of trust in the defensive line.
These aren't technical issues, they are coaching issues.
Perhaps the reason he hasn't been sacked is financial? Having already sacked 2 coaches in 2 years (or forcing one to resign) the club's dollar position on the coaching front isn't exactly positive - what the heck, why not see how Kearney goes until the end of next year. The business side of things is profitable at the moment, why lose money on the coach when we're making money otherwise?