You're problem is that you're happy with 20 wins and a tourney bid, everything else is gravy. Painter has been "building" the Purdue program for 18 years. Yet, his tourney performance has arguably gotten worse over time in terms of losing to low seeds, including the worst tourney loss in NCAA history (and that's with what some would consider his most talented teams).
So, if you don't believe March matters, then that's fine. But outside of West Lafayette, March is all that matters, and is what the program reputation and perception (from the media, recruits, etc) is built upon.