Driven by irrational exuberance.
The other problem with power pro or other trailing hook line is.. it is too limp. (just my opinion) The hook bounces and bobs, twists, and flops around back there, and doesn't really swim true. I guess I don't like leaving it up to chance on where that hook is when a fish hits. I like to know it is swimming correctly down or up and not in some random fashion. I like using tubes where I can tie a loop and then have the knot of the loop pull into the tube or have the tube stop the knot from coming up. ( mainly frodin tube material and now protube's nano tubes and even the flexitubes). This way you have a more rigid trailer using the stiffer mono in the loop that swims better and more consistent.
I've heard from other tubers that they like the way they can position the hook up or down. However, I was never convinced that the hook stays positioned all the way through a swing with just a pair of lead eyes for geotaxsis.
Also, it takes me a couple times to get the loop size correct on a tube stream side. I suppose I could get better with practice. Too many times I just saw "that's close enough!" and cast with the hook flopping well beyond the junction tube. I've caught fish that way too.