Good deed, sad end

I read this article about the good deed that Matthew Jackson performed for Jamie-Lynn Knighten:

http://www.dailymail.co.uk/news/article-3336516/Man-dies-day-pay-forward-good-deed.html

Less than a day later, a car accident killed Jackson. I honestly don't understand it when people who are genuinely kind seem to die young whereas people who have been vile to others appear to live beyond the average life expectancy. This is a generalisation, of course, but it's a pattern I've noticed.