After doing some researching for head coaching related threads in early 2011, I was reminded that the only guys we sought contact with were Greg Manusky, Perry Fewell, Rob Ryan, and of course, ol' tree face Ron. All NFL defensive coordinators. Worst part is Ron probably was the best candidate out of all of them.
In January the next time we look for a head coach, I hope JR doesn't order the same lame, narrow-minded approach, because being stubbornly closed-minded in thinking only NFL DCs can lead you to success didn't work then. So the answer to that question is no, we probably didn't hire the wrong guy, and that's the sad part, because Jerry's so out of touch with what's working in the NFL he probably doesn't even know 3/4ths of the names of other prominent HC candidates that aren't DCs.
Oh and here's a sample of my state of mind after hiring Ron at the time:
i like our coaching personnel better than i like SF's