I got around to watching the original video in T-Star's first post. The guy makes the point that when the knife is closed, the blade is completely concealed/buried in the handle, so you can't cut yourself on it when it's closed. While not a switchblade, the knife opens and locks into place via a small knob for the thumb. "Assisted opening," I assume.
The guy in the video also makes the point that the dagger design of the knife is for stabbing, and that it is not very good for anything other than self-defense, i.e., stabbing people.
So, if that is the knife's purpose, and given its design, why is it dumb to sharpen both sides of the blade of this particular knife?
Interestingly, the guy also says he has a company called Razor's Edge in Salt Lake City professionally give his knives a razor's edge. I believe he says he has them alter the bevel, although I guess that's easy enough for someone who knows what he's doing.