...the name of the thread is "Why not Ron Paul, exactly?" ...
You could ask the same question about tons of other fringe candidates.
Why not Ralph Nader, exactly?
Why not Dennis Kucinich, exactly?
Why not David Duke, exactly?
Just like Ron Paul, they all have their share of passionate followers, but they are all out on the fringe and absolutely unelectable as Presidential candidates.
Blah, blah, blah. <insert name here> is the only candidate capable of saving our Country!