ME, they didn't ignore he existed you can see him multiple times in the background of shots he just wasn’t interviewed. Plus the story of it all basically became a puff piece about Jordan and those who were personally closer to him had more involvement in it. Not defending the decision made but that’s what they went with in the end and Longley has said that he wasn’t overly close or had much to do with Jordan. Henceforth why there were was more time dedicated to the likes of pippen, rodman, jackson etc.
Also while he did serve a good role on great teams, it’s not like he was one of a kind, the team just needed a big body who was tough, could defend and rebound, which in the 90’s there were many. Could they have interviewed him? Yes but from a creative decision very few people other than diehard Aussie basketball fans would’ve liked to seen him in it so it wasn’t like leaving him out was some grave mistake. Naturally people want to spend time on the more well known people in the nba circles.