Well I'm not Jon, but let me take a crack at this.
Because they're professionals?
Because it's a press conference, not an expose for investigative journalism?
Because they are not fans, they are asking questions to get quotes for an article for their job?
Because this isn't a school yard fight
Because what would be gained? Do you think KF will suddenly say, "alright, got me. I stink?"
Because there is a difference between tough questions and loaded ones?
Because unless they are writing an editorial piece, their job is not about analyzing the coaches performance?