In this case I believe it to be true.
People opening and closing the lid too often and with too much force will eventually cause the problem. It's nothing to do with Apple cutting corners, it is people using the product improperly.
Please, I'm appealing to the voice of reason here, under no circumstances could a reasonable person think that this is caused by accidental damage.
The flex cables are routed through the hinge area, an area that is supposed to move as the computer is opened and closed repeatedly.
Lets assume for a moment that when engineering the product, the team conducts studies to determine how consumers would typically the computer - where the machine is used, how it's transported, the temperature conditions it's subjected to, and how any mechanical components hold up over time. Even comparing a new product design to previous generations.
Some of these computers look pristine. Not a scratch, no dents, no broken glass, kept clean, closing the screen the same as anyone else with any make and model of computer would.
But the cables are failing. And technicians are starting to notice a pattern. I know I did, when the first machine came in with the symptom "loss of backlight when screen is opened past X degrees", followed by a second, third, fourth, fifth, sixth, and numerous others since.
It's an engineering issue. If the cable is failing prematurely, it wasn't engineered correctly to withstand the task it was intended for. If it was engineered correctly, but the computer itself is so fragile that customers are expected to avoid basic tasks like opening and closing the screen too many times, then the computer itself wasn't engineered to withstand the tasks it was intended for and it doesn't meet customer expectations of quality.
I don't mind that some customers love their Apple products. You do your thing. But sometimes even the most beloved products have problems, and instead of excusing them, I think it's better if we unanimously agree on it, acknowledge it, request a better product with these issues resolved in the next iterations, and ask that existing owners be taken care of in the form of warranty extensions and part revisions where necessary. That's how the consumers benefit from the situation.
It benefits nobody but the company to pretend that such issues don't exist or the blame lies solely with the consumer, especially when all they're doing is opening and closing the lid on their laptop.
This is a lie. I experienced the same issue on the MacBook Pro 2014 after using the laptop in clamshell mode with a vertical stand while doing intensive tasks for hours. The lighting goes away after the laptop cools down.
This isn't a lie. It isn't the same issue you described either. In this instance the issue is that traces within the cable are broken, causing a loss of transmission of power to the odd or even LEDs. Only half are then lit, causing a stage lighting effect. The issue is that the remaining traces soon follow, and the remaining LEDs also cease functioning, resulting in no backlight altogether.
It doesn't get better once the machine has cooled down. Once the traces are broken, they're broken. They may make contact and work momentarily if the screen is opened only a few degrees, but they will lose connection again and cut out when the screen is fully opened.
Nothing short of replacing the cable will resolve that, or in this case the entire display assembly as the cables are routed in behind the glued-in LCD and glass panel, making removal extremely difficult. (If not impossible without cracking the glass, given the heat and force required to separate the adhesive coupled with how thin the glass itself is.)