It depends on how you define luxury. You define luxury as a pick that wasn't in need. Others define luxury as a selection that was made DESPITE far more pressing needs. Yes, safety was a need. But this was a team that was rebuilding and still reeling from the loss of Pat Williams. When you have your choice of blue-chip DT's in the Top 10 you don't pick that safety unless he has the potential to be a gamechanger... Whitner wasn't a game changer in college and there was no way he was suddenly going to develop into that as a pro.
This is not about being a "chubby chaser," it's about basic common sense. I know you threw all your chips in when the Bills selected Whitner. You even bought his jersey. But it's time to let go, now bro. He has been a disappointment and the end of the day, those who lauded the Whitner pick were (once again) proven wrong. That said, I don't necessarily agree with trading him... I doubt he'd command a significant pick in return and might as well keep him on the roster as a 3rd safety.