No Wheel Weights!???

The story I have heard about the dots on the tires was it is for a reference point for remounting the tire after a repair or valve stem or TPMS replacement. Also heard it is used as a reference point if the tire rotates on the rim knocking it out of balance. A buddy of mine had that happen on a Ram pickup. One tire would rotate on the rim. Dealer remounted the tire, noted the mileage and sent him on the way. After about 150 miles, the tire had moved quite a bit, so the dealer replaced the tire and it still happened. The rim was found to be on the low end of tolerances, but still in tolerance, so the dealer used a liquid bead sealer to "solve" the problem.