What is a competent owner? Wouldn't most owners who were deemed not competent become competent after winning? It's the same way with coaches. Coughlin had to go, until the Giants won a Super Bowl.
I don't think Jerry Jones is a competent owner, and he's won a few championships. Dolan has owned the Knicks and Rags for how long? He's won a championship, but would he be considered competent? Jim Irsay is a pretty big moron, and he's won championships. There have been plenty of bad/incompetent owners who have won a few championships...it's just a lot harder with that in the way.
To be fair...MSG has zero championships since Jim Dolan took over in 99...in 94 cablevision only owned 50% of the Garden with ITT owning the other half.....Jim Dolan had little or nothing to do with management of the Rangers and Knicks. In fact they only bought there 50% stake the year the Rangers won there cup.
Edit....it looks like cablevison didn't actually buy there first 50% stake in the garden until 2 months after the rangers won the cup