For some unknown reason, my wife became almost obsessed with side to side weight distribution.
She would move heavier books from one side to the other "to balance the load". I explained that to a vehicle that weighs over 15 tons those books won't make a bit of difference. The obsession continued until I said, "OK, to balance the load from now on you have to sit on the floor in the middle aisle."
Problem solved. No more side to side distribution complaints.