People die of all sorts of things every day that have nothing to do with anything except just living life. We all know this because every family experiences it.
My wife's uncle died of a massive blood clot when he was 60, 2 months before my 23 year old was born. Was in great shape, didn't smoke, didn't have any health issues at all that the family was aware of.
One of my work friends had his dad drop in right in front of him when he was only 30 years old. He told me his dad was dead before he hit the floor. Was 100% fine and laughing 1 min before. Next thing he knew, he was on the floor, and had bitten his tongue almost off.
My great-aunt died of a massive blood clot when I was 15.
About 10 years ago, one of my best friends from high school was driving and ran off the road and crashed. He ended up passing away. He was in his late 30s. We thought he died from the car crash but his injuries were minor. Turns out he had some sort of stroke.
and on and on and on