IT’S BECAUSE OSHA REGULATIONS! A SINGLE PERSON IS NOT ALLOWED TO LIFT MORE THAN FIFTY POUNDS! BAGGAGE HANDLERS ARE PEOPLE! YOU PAY MORE FOR HEAVY BAGS BECAUSE THE HANDLERS ARE SUPPOSED TO USE THE BUDDY SYSTEM TO LIFT THOSE! IF THE TOTAL WEIGHT MATTERED SO MUCH, PASSENGERS WOULD GET WEIGHED, BUT WE DONT QUESTION THAT NOW DO WE?
Ohhh. Thanks for the explanation, @kbokbok! I never knew that it was for the baggage handlers’ safety.