When you're young you think you are invincible. Until things that "happen to other people" start happening to you, I don't think you ever realise bad things can happen to you.
The longer you live, the more likely it is that something that “happens to others” happens to you.
A natural disaster, a car crash, cancer. Bad things will happen.
I don't want to leave it to chance whether I can deal with these things or not. I work on my thinking constantly.
And the best remedies for prevention and cure of hardships have stood the test of time. Through stoicism, meditation, gratitude, exercise and healthy eating.
You need no more, apart from time to aid the healing.