Huh. My wife and I deliberately did the opposite of the "avoid exposure to allergens (especially nuts)" guidelines for kids because it seemed like obviously ass-backwards, stupid advice, considering that rates of kids with serious food allergies seemed to have gone up like 10x under those guidelines vs. when we were kids and everyone just fed their kids peanut butter (and everything else) ASAP and serious food allergies were a thing that a couple kids per school had, rather than a couple per classroom now. Looks like we guessed right on this one.
Did you read the linked page? Or google for how recommendations re: feeding kids peanuts have changed since 2015? We concluded the advice was wrong because very few of our peers in school had food allergies, but now a crazy percentage of the kids who've grown up under the no-peanuts-for-kids-or-even-for-pregnant-women advice are allergic to peanuts. And it turns out we got that one right.
What I'm saying is: do what you want with your own kids.
Feel free to discuss your ideas/concerns with other parents and censure them like anti-vaxxers if you want. BUT if you either 1) don't ask them first and give their kids peanuts or 2) disregard their concerns and give their kids peanuts, and a kid dies because of it, you are culpable and responsible for that kid's death.