Deck collapses happen all the time, and many of them never make the news.
Several years ago, I attended an all-day training session put on by a leading manufacturer of metal structural connectors for decks, homes, and other structures. They estimated at the time that over 80 percent of the decks in the United States are structurally deficient and ticking time bombs. That speculation is staggering, and it should immediately put your head on a swivel.