I see dual sports all over the highways, guess most of them are like most of this forum, afraid to get it dirty. If I had to use one of these for a highway bike I would get rid of it drive a car, road bike it ain't.
You're certainly entitled to your opinion, albeit dogmatically expressed, Dave0430/O430; however, I profoundly disagree.
My riding partner has 55,000 miles on his '08 KLR650, having traveled to Mexico, Canada, and considerable jurisdictions between 'em, including Colorado passes, Big Bend (good heavens! You don't suppose Big Bend is CLOSED, under the federal government shutdown, do you?), etc.
His other bike? A BMW boxer twin, parked in his garage, mostly!
I've ridden three Southern Appalachian Tours with him; two "token" KLRs amid a BMW-rich convoy!
I would not presume to generalize, regarding the application of the KLR650; a passable "road bike," within my experience and observation.
That said; "YMMV!" (Your Mileage May Vary)