No of course not, don’t be silly!
But when the airline effectively forces you to choose between (1) a $500 change fee and a re-pricing at current fares that are 2x what you paid because you don’t meet the advance purchase requirements of the lowest fares anymore and (2) just buying a separate regional add-on flight, nobody in their right economic mind would take option # 1, when the only benefit of doing so is to get those 3 extra letters on the bag tag.