Everything I said you can double check on your own using google. Spend some time on bitog.
You're also confusing 2 slightly different ideas; higher viscosity (HT/HS) does mean more protection. That's a fact. That's not the same as answering the question: "How much protection do I need for my use case". My choice of oil is determined by my use case (towing often), and backed up by many UOA reports through the years.
Guess which UOA showed the highest amounts of iron and copper per 1000 miles? Yes, the one time I ran 5w-20, it had more iron/copper per 1000 miles vs the same formula in 5w-30 after it, as well as before it (which is doubly telling since usually wear metals decrease as an engines breaks in and ages, until it gets really old of course). The one time I ran 0w-40 it performed very well, but not better than the 5w-30 runs. A 40 weight doesn't take longer to reach the bearings, that's nonsense (we have positive displacement oil pumps, the same oil is pumped through at the same rate, but your PSI goes up with viscosity and lower temps). However 40 weights have a larger amounts of VII's which can bring more shearing and carbon deposits vs a 30 weight, so there is diminishing returns. Again, my choice is backed up by the specs on the oil itself (HT/HS) and UOA reports, I'm not guessing or hand waving, it's actual data.
Do you personally need to run 20 weight? I don't know how you drive, what temps you see, how often you change your oil, how long you hope to keep your truck, are you worried about warranty... and so on. That's all separate from what we were arguing here: Does 30 weight offer more protection and headroom, and yes it absolutely does. The only disadvantage is a very minuscule hit in fuel economy. It doesn't effect us personally, but for corporate averages it really helps Ram when they save every fraction of a percent they can.