I don’t know how you’ve seen nobody in the world that has cut their fingers or their hand while using a knife. There are millions of people who use dull knives because they believe they’re safer. Just because you haven’t hurt yourself yet doesn’t mean you’re not introducing unnecessary risk. I’ve helped two or three people learn how to cook, and all of them have come millimeters from slicing the tips of their fingers off at one point or another by pressing down on a knife with their fingers curled under the tip. I keep my knives deadly sharp, so a slip is a lost finger. You may not even realize you’ve cut yourself. As long as you’re using them properly, they’re safer.

Sure, you may go a decade or two with unsafe knife practices and be totally fine. Survivorship bias is a hell of a drug, though.

I trust him to be competent in things he’s knowledgeable on, but for things he’s rarely done I’ll offer assistance if I know a bit more, and I expect the same from him. There’s zero shame in not knowing how to do something. I WANT to be corrected when I’m wrong or being unsafe. I don’t understand how anyone could want anything else.