Assuming you wash your other produce (you probably should, especially if you buy organic and don't like e. coli.), the question you're asking is just "how does the crap on the outside get into the inside?" The usual route for those contaminants is peel -> hands -> fleshy fruity bits. A lot more is transferred than you might think.
For a bit of fun, try the same idea with a few dirty potatoes. Wash two thoroughly, and leave one unwashed. Peel a washed one, peel the unwashed one, and peel the last washed one. You'll observe that both of the latter two are much dirtier than the first one [0]. It won't be as dirty as what you started with, but it'll still be enough to cause some minor taste issues and (depending on the type of soil) make the dish feel gritty as you eat it. Contaminants you can't physically see/taste/feel are transferred the same way.
[0] There's a minor confounder in that potato flesh can oxidize, and that discoloration might be perceived as dirt. It's not as bad as with, e.g., apples though. Just work quickly, and the difference in dirt levels should be apparent.
Its the same type of idiotic comment under any tiktok/short/fb video from any kitchen when chefs work without gloves: „EeW, UsE glOveS!!11“
That tiny amount of dirt wont kill you, but definitely keep your immune system in working order
The issue is not the literal dirt. Dirt is fine. The issues are the pesticides and industrial contamination like whatever's on the floor of the packing plant or grocery store.
Plenty of ways to keep my immune system updated providing myself scratches and cuts while mountain biking / trail running, let alone eating snacks while on the trail with my hands absolutely not clean, or by simply breathing in a forest.
But ingesting the black residue from exposure to diesel smoke while in transport is not for me, thanks. Feel free to train your immune system to dispatch tar.
Maybe in order not to get the (particularly bad, as far as I know) pesticides on your hands? I wash my hands after having peeled an orange, but washing the orange itself seems like a waste to me.
I don't really know. I could understand if it was for zesting, but then you're supposed to use untreated oranges anyway because the pesticides don't wash out easily because of the oils on the orange's skin.
She is 1.9 years old and anything that looks like food will be bitten. But to tell the truth, you even need to wash bananas: pesticide residues (you can transfer chemicals to your hands and then to the editable part), can collect dirt/bacteria/rodent excrement.
It depends on a lot of things. You could just as easily wash off the wax that was applied to the orange and make it spoil faster that way, and the extra moisture will cause delicate fruits (like berries) to spoil more quickly than any gains you'll get from the removal of dirt and larvae if you don't dry them very thoroughly.
