Just like me trying to avoid sweeteners for decades now because I suspect they might turn out to be bad for you (and noone has ever tried to suggest they are actively good for you...) If it turns out you're wrong, you've lost very little, if it turns out you're right then there's no way to retroactively undo the harm.

I have a fairly sensitive sense of taste and if I eat an unwashed fruit with a rind and manage to touch the actual fruit without washing my hands after touching the rind, I can often taste a bitter chemical flavour that otherwise isn't there. How harmful those chemicals may be and how exposed I'd be without directly transfering them to the food or to my mouth (or eyes or whatever) I'm unsure (and, tbh, while I always wash oranges and stuff, I often eat bananas unwashed as there's no need for the outside to come into direct or indirect contact with the actual fruit itself.) I'd still prefer to just not eat whatever it is if I can trivially avoid it (both for possible safety reasons and just not having my food taste like bitter chemicals reasons.)