UkEngQatar,
Most of us have noticed that!
Its not the rule that is being discussed here, is the total inability to solve the exceptions!
Not everywhere, the credit card is asked, including Qatar Airways in Heathrow!!!!

Let’s face it, the ground staff at Doha International airport do not have the personal and professional traits to deal with exceptions. Being castrated by the strictness of the airline does not help either!
All they will do is to repeat the rule and if you try to discuss a solution they will ask you to write a report to QA.
They are almost like programmed robots:

10 IF Problem, then repeat rule
20 ELSE, GO TO 30
30 IF not accepted, then suggest customer to write a report.

this summarizes the ability for problem solving of QA ground staff at Doha International Airport. Not always being the case of the QA ground staff at other international airports.