The time cost for diagnosing the cause of an issue can be quite high, especially with these tightly integrated devices that have to be laboriously disassembled

The time cost for diagnosing the cause of an issue can be quite high, especially with these tightly integrated devices that have to be laboriously disassembled for repair and reassembled for test. That's a high cost of high-skilled human labor, when there's a much lower cost in just getting you a new part. It also means they don't need as many employees to execute repairs, nor do they need as much detailed training on repair procedures.