I don't yet have a jetboat (because, right now, I don't have any boat), but in my neck of the woods, the Legends and whatnot, that are fast, but with thin hulls, wouldn't last very long.
Best I can tell, those midwest boats are for running shallow, wide rivers, where the hazards are mostly shallow gravel bars and whatnot. Around here, in the North Georgia mountains and foothills, we don't really have shallow wide rivers, with gravel bars and whatnot. We've got narrow, curvy rivers with ledges, shoals, sharp rocks (many of these are young rivers, so the rocks aren't smoothed over), Indian fish traps, and pig iron (slag) from civil war cannon making (they would repair some of these Indian fish traps by pouring molten iron in, making a real sharp, yellowed from rust, "rock" that will rip the bottom out of a boat).
Just about everyone set up to really run these rivers have UHMW. There are a handful of people without it, but, especially on the Etowah, those that can truly run it all day every day, and don't have to work with the generation, have 3/8 or thicker UHMW. Our boats are generally quite slow in comparison to the midwest boats, but they are also significantly heavier (many have 3/16 hulls), so the main goal is hole shot, not speed. Besides, because our rivers are narrower, and quite curvy, the speed doesn't have much value - it's not safe to rocket around the blind turns.
The forward console is to give the operator the best possible view of the water ahead, to clear as many obstacles as possible, as well as to move weight forward, to get the nose down. I'm not sure about those midwest boats, as I haven't been on one, but I think they ride on, or almost on pad, so nose light isn't a problem. I think in clear water, the midwest boats will be able to run shallower, but once they hit ground, they can't keep going. We will run shoals and whatnot, bouncing over what is to shallow to run over.
Ours are nowhere near as pretty as the midwest ones though. We have quite a few welded 16 - 17' welded mod vees that have been retrofitted with UHMW on the bottom, and a couple inches up the sides, and run UHMW intakes. The new boats built specifically for this type of river aren't ugly, but they aren't the sleek bass boat looking rigs that the Legends are.