Here's an idea for you to consider. When old people start to get really old, sometimes they have their obits written ahead of time, especially when they know they aren't going to be around much longer. And when it's famous people, they distribute these to various news outlets so that the news can get out because the public likes to know these things.
If she died in a skydiving accident, they'd change that line. If she died screaming and convulsing, they'd still probably say "she died peacefully in her sleep" because that's really none of our fucking business.
Nixon had a speech pre-written in case astronauts died on the moon, is that the same as just "making shit up", or is it being prepared for a likely possible outcome?