Well, sure. 'Literature' is used for all kinds of things, from classic novels to poetry to scientific papers. But in (non-specialist) bookshops, it's primarily 'classic/good fiction' with some other stuff thrown in. Those shelves are usually marked 'Literature', not 'Literary Fiction'...
Yes, that's true, one definition of literature can be anything that is written. I'm not trying to have a semantic argument with you though. Use whatever words you want, but if you think of this long form journalism as a form of... let's call it art writing, then maybe it would make more sense. If you want to say that having magenta pull quotes makes it not art then I can't help you.