If you read the article, the SD card was placed there by the camera manufacturer and then the device was sealed so it would withstand pressure, and then sold to divers. Blame the camera manufacturer's engineers.
Seems like the SD card of all things performed just fine, so it hardly seems like the weak point.
They are surprisingly resilient! There was a blog post a couple of years ago by someone who found a digital camera in the sea which must have been in the water for months. The author could look at the photos to see if they can find the original owner of the camera.
Seems like the SD card of all things performed just fine, so it hardly seems like the weak point.