This is absolutely true. The growth of tire width to levels that are ridiculous results in the contact patch getting quite large for the weight that is on that patch. Therefore, the psi loading on the patch is down. This will result in the patch giving up the grip far sooner than a narrower and smaller tire with higher psi loading. Unfortunately, it is not a practical solution because you probably would need a second set of tires that are three sizes smaller than the ones you currently have on the vehicle. The handling characteristics on dry pavement will be quite different with these smaller tires and the tire wear will be greatly accelerated.