This is why writer interviews are bullshit. It's basically a retroactive look back on the scenes after they potentially gather more info and think of other ideas to write - that they should have wrote.
The solution of course being to just write another comic containing the "new" ideas but that never comes to fruition. Likely because they only want to add one small detail and not make a new story. And their small detail is utterly worthless to really any sort of reason so they just don't.
It's basically like watching people without the power to George Lucas their work, but they really want this to stick.
It's ok if they explain something that makes sense logically within their own work, but most times they just want to add things where there's no logical way to leap to this area. The validity of a writer interview long after the book is published is dubious more often than not.
People come for the comics, not the interviews.