So... no food and safety regulations, because life is not safe, and people should have the freedom to poison food with cheaper, lethal ingredients because their freedom matters more?
You're right that things can't be made more safe without taking away the freedom to harm people. Which is why even the most freedom-loving countries on earth strike a balance. They actually have tons and tons of safety regulations that save tons and tons of lives, even you from your point of view that means not "treating people as adults". You have to wear a seatbelt, even if you feel like you're not being treated like an adult. Because it's also not just your own life you're putting at risk, but your passengers' as well.
You're taking the most extreme libertarian stance possible. Thank goodness that's an extremely minority view, and that the vast, vast majority of voters do actually think safety is important.