Hardcore partisan ideologues certainly know how to avoid taking responsibility, so you may be right.
I think it's more a matter of wanting someone who can get shit done.
Webb was a do-nothing, one term senator. His one accomplishment was that he was rude to President Bush once at a White House dinner. Then we really didn't hear anything from him ever again. He didn't even want to do the hard work of running for second term.
Sorry, man, I want someone in there who has a vision of what he wants to do and can get it done.
So this is why I wouldn't be horribly upset if Walker or Christy got the GOP nomination. These are guys who roll up their sleeves and do the work. Don't agree with them politically, but they get the job done.