Yeah I don't get it. Being in the middle of the field, it's hard to kick to the touch without it going out on the full, he also didn't want to kick it dead. The ref would likely call time off in both of these cases giving the Dogs a final play or 2. The other option was to take the tackle and risk a strip, (or a penalty for submission; is that still a thing?) or pass the ball with no absolute knowledge of what the other bloke was going to do. He took the best option.