Unfortunately it's the nature of the beast. You do these presser events or just interviews with all the local radio/journals to promote shows and the people asking the questions can't be the ones to NOT ask about the STP split, or about the Texas show. Each media outlet just wants their one snippet to say they did their job and if they manage to get a juicy response then great. But it would take the interviewer being a true fan, or the interview being for a specific purpose (we want to talk about the 20th Anniversary of Core, etc.) to dive deep.
Marry that to the fact that Scott usually closed himself off because partially of his personality and because of the history he had with the press, and you're unfortunately not gonna find many interviews that would be considered golden.
Not even just for Scott, I always get bummed when any artists are getting interviewed for a current release/project and the interviewer asks about pretty much anything but that, and the artist eventually has to cut it off and flat out ask "do you have any questions about this album?"
It is a shame though. I've always thought there's still so many more things I'd like to know about Scott. I had hoped his book would fill some of that need, but it wasn't even close.