I don't think winning a title is required to go down as a hall of fame player. There are plenty of great players who never won a ring that will be inducted. Karl Malone and John Stockton come to mind. I'm not comparing Webber to those two, as I think they are on a different level, just saying that not having a title hasn't/won't stop other all-star players from getting in.
Why should Doug Christie, Mike Bibby, and Hedo Turkoglu's inability to hit free throws be counted against Chris Webber?