The dangers of hiking alone and of the woods and presumably the deserts, too, are overstated. There are those who never leave home without a gun and a complete second-story kit. I suppose they all have their reasons. I can realistically only base my ideas on my own experiences, all of them, and I'm 71 now. Chances are, I've already had most of my experiences, too. But I still drive to work (my last day is this coming Friday, I think) and the driving scares me more than anything.
Colin Fletcher spoke of issues relating to going alone. If you want a risk-free life, chance are, you wouldn't be making any posts on this forum. Just let someone know where you're going and when you're supposed to be back, as a minimum. After that, you're on your own. But some people don't like being by themselves anyway.
Serious rock and mountain climbing, however, is something else. My wife had a former co-worker who disappeared on Mt. McKinley about 35 years ago. Ironically, we learned about it from a newspaper article. His mother was a grief counselor. She wrote an article for the local paper, the Washington Post, in which she described having to deal with personal grief herself.