I absolutely agree with the weight impact in theory, it's just that I just haven't run enough different tire setups to have the experience of direct comparison for real world impact between weight, load range, and scrub radius...if I could get a 34 or 35 BFG KM3 that was 11" or narrower in a load range C it would be easy, but that doesn't exist so I have to find the right balance and I'm hoping to lean on the experience of others rather than conducting a series of $1000 experiments before getting it right.
At least in the sizes I have looked at (35 and 33 x 12.5R15and all in C), BFG's run lighter which I like and Toyo and Nitto run heavy (a 33" trail grappler or open country mt weighs more than a 35" KM3), with Milestar, General, Cooper, Yokohama generally in the middle.