It's not about sterility. Dirt/sand in your mouth is a very unpleasant experience.

While i think peeling is wasteful, this is not true: https://www.nutritionletter.tufts.edu/general-nutrition/does-peeling-carrots-remove-nutrients/

80% of the vitamins are not in the skin. There are exceptions where the skin of some fruits and vegetables are higher in a particular vitamin(s), like for instance potato skins are highest in iron or something like that, but it is untrue that the majority of nutrition is in the skins of these foods and discarding or peeling them removes “80%” of the nutritional value of the food.

I don't want to grind earth, sand and/or dung on my teeth though.

Man likes to eat sand, what is wrong with that? He isn't telling YOU how to live your life!

I like to scrub mine with a kitchen towel or mild plastic scouring pad in warm water. I also do the same with any other palatable skinned root veg.

I love this comment

I miss that guy

It was a joke, and I'll never eat that chef's sand carrots.