All conjecture aside, everyone think back to what makes a HD truck “handle” a trailer better than a 1/2 ton. I don’t mean more power to pull it easier, I mean handling the weight and push pull of the trailer.
It’s TV weight, stiff suspension and stiff tires.
If you can accomplish 2 of the 3, IE tires and suspension, it will be markedly better than soft tires and soft suspension.
Even aired up, way up, P or XL tires aren’t as stiff as LT tires.
I run 44psi rated tires at 50-60psi when the load capacity is needed on my little half ton.
It helps tremendously in controlling the trailer as well, however they’re still A bit softer and roll over more than a comparable E tire at 60 psi.
In 30 years of driving/owning/ towing with 100s of different combinations. Most not “calculated”. It’s construction. No one is spending hours setting up their truck If trailer needs to get from A to B NOW. I’ve never seen a single downside to E tires on a half ton. None. Adjust pressure to your load/preference and go. Far more adjustability and capability with “too much” tire.