We are beyond the point of useful discussion. You have anointed yourself as more knowledgeable than the manufacturers so it is what it is. If you want to sell everyone on the need for 5w30 and HPL, then do so but it is not necessary for the vast majority of users - it is more costly for no appreciable benefit in a non commercial context. And again, if you use a shop and the truck is under warranty, expect quizzical looks and grief when you ask to use a non-Spec oil but disregard that too because these shops are all obviously fools too.
As long as we are in the realm of unreliable anecdotal evidence, instead of the controlled testing the majors do when making a viscosity recommendation, my truck has 50k on it now. I use a good 5w20 synthetic as specified. I tow a dual horse bumper pull trailer, and an open car trailer, regularly and it is quiet as a church mouse. No oil useage. Temp never gets above high 220s.
One other question I would ask: how many cars or trucks have you taken to 200k or beyond? If you have, then you know that while certainly engines can fail due to lack of maintenance, if they receive even a modest level of maintenance they are generally reliable in the sense they will continue to run. The issues that kill old cars are labor intensive engine oil or driveline leaks, transmission failures, AC and heater core overhaul, general cosmetic wear (ie paint failure on horizontal surfaces) the seats and suspension get worn out - point is overhauling these things from a cost perspective makes it logical to retire the vehicle. Having taken three cars to 250k or greater, that colors my analysis about how crazy one needs to go with engine oil. You can have a perfect motor at 400k (very unlikely) but the rest of the car is toast. This is why this is all classic over think, but it is what it is. Take care.