On an RV Forum I saw some posts about tire failures:
There were some posts that mentioned the RV total weight capacity or Gross Vehicle Weight Rating (GVWR). Others were mentioning the total of the Tow vehicle plus the RV Trailer or Gross Combined Weight Rating (GCWR). While others were talking about tire load capacity.
One person responded with: "You need to pay more attention to just what
acronyms are telling you. GCWR has nothing to do with tire inflation
pressures. The tow vehicle and towed vehicle are individual vehicles and
answer to their own standards and regulations.
Maybe you should ask Roger why, during his working years with tires, the interplay sheer problem was never corrected. (Interjecting a fear factor for attention purposes might be Roger's goal).