First of all, Raffaele has given interviews on Italian TV. Because Raffaele really has not insight into how the crime went down (he was not there) this means that he really is a boring interviewee, unless your story is, "How do you cope in prison knowing you are innocent?"
As for Knox, this is EXACTLY what she said she'd do. It was only PGP who tauntingly from the sidelines (or from behind a pseudp on the internet) challenged her like bullies to "come clean". When she didn't these same people filled the void with conspiractorializing her relationship with her family, saying stupid things like, "She knows she did it so she has to be quiet," or "Her family knows she did it, but they can't say so, because they'll ruin the book deal." Stupid things like that.
What I cannot understand, after ALL everyone has gone through, is, why can't people just do the straightforward thing..... Knox and her family said they wanted privacy, said they wanted to be out of the public eye for a long while after four years of torture.... and this is exactly what they are doing?
It is the height of irony that the British tabloids are still harrassing them in Seattle, yelling out questions like, "Hey, Foxy: how are you enjoying your anonimity!???" <Click> <Click> "Hey, luv, how about a smile!"
I think they are sick and tired of having their beings being created for them.
And if by this you mean, "why haven't Raf and Amanda had a discussion of this together," what possible business of yours is that? That is what I call voyeurism.
You do know that these are real people and not SitComm characters?