I just got a little annoyed by the repeated references to the V2500 as a product designed and/or manufactured by Airbus and the subsequent questioning as to why Airbus failed to redesign the offending parts.
You are right, of course, and I stand corrected in that Airbus didn't actually design the engine but the bottom line, in this case, is that it is their aircraft which is affected and, despite the previous occurrences, both they and the regulatory authorities are happy to leave the design as it is and rely on humans to spot something that can and does easily happen and could bring an aircraft down rather than just, maybe, providing a bit of inconvenience for everyone.
The comparison with the DC10 cargo door is not out of place. They were also relying on "someone" to check that the door was properly closed. If, God forbid, there was a crash with loss of life everyone would be saying exactly the same thing "Ah, sure this happened before but nobody did anything about it".