This just makes no sense. Ilija was ranked #101 at one point and would have made it to the Top 100 if he wasn't one of the biggest headcases on tour. He furthermore excels on the fast surfaces (indoor, grass), where Viola isn't as comfortable.
Prior to the start of the year I would have agreed that Bozoljac wasn't going to qualify, but the very fact that he was willing to get his act together in Futures - where he has often lacked the motivation to even try - signals that his head is in the right space. Ranking is irrelevant here.
How does it not make sense, if you are a headcase then you are ranked where you should be if you aren't willing to maximize the talent like I said, I know Viola doesn't usually have success on HC, but he has had some, like he qualified for this very event last season.
My point was that Bozo was beating Futures level players, so it was a low level, so I would not be thinking that no matter how well he did at that level, it still would not be good enough to go from that to qualifying for an ATP event.