Poke, Prod, Piss Off

I have never understood why big hitting batsman like McCullum do this. They get in a bad trot and poke and prod rather than play their natural game. Sure, we will bag them if they get out to a silly shot but nothing like what they get by frustrating the hell out of themselves and us with a stone wall display. He is not made to play the patient grind for 40 overs and nether are we. Get on with it or get out!