Airbags are for load leveling in ANY vehicle. They're not required, but I'd have them on ANY vehicle that does a lot of towing. There is also a difference between something that could be done in theory; though it's a completely different ball game when everyone that bought it to tow better than the larger trucks is doing exactly that. If you feel safer towing the load with a semi, that's your choice. Don't knock it just to do it, especially if you have no experience with it. Certainly don't compare it to other trucks that you feel are in the same category, yet have known short-comings.If you have to modify a brand new truck with air bags to tow better then there is something wrong right straight out the shoot. Yeah a 15k 5th wheel trailer behind a Tundra in the flat lands of Texas may be ok, but after looking at Google maps it appears as Tsafa lives in the hilly part of Pa and I don't forsee a Toyota working out well in a mountain region.
You can put 4.30 gears and a power house 372hp motor into a VW Bettel it sure as hell doesnt mean it'll pull a grade or be able to stop the load. I've been driving trucks and trailers way to long to know that I want the longest heaviest truck I can possibly have out infront under the load for better controll.
It's neither a F150 nor Silverado, but it has replaced many owners F250 and 2500. Their words, not mine.