Having courage is different from losing your fears...
Having the courage is about overcoming your fears, it means that fear is still there but you are strong enough to win against it. Losing your fear is a different thing, it means you are not thinking... and only fools don't think. If you're trying to measure the depth of an ocean, and you just jumped off with your two feet... it is NOT courage... it is called foolishness.
And a lot of wise people lived longer not because they were scared to jump, they are just wise enough to know that there are other ways and getting killed is never the best way to know the answer.