Read somewhere (attributed to Mark Twain);
"The Old know too much to not take any risks; the Young do not know enough to not take any risks; and what amazes me is how they achieve it time after time."
Paradoxically, I think that the "Dunning–Kruger effect" (within limits) is actually necessary for us to evolve. Think about it; if you don't jump into the unknown with confidence, you won't learn/do anything. It is important to assess risk but also know when to stop obsessing over risk.