And if someone is allergic (probably shouldn’t be handling molts of any type at all) it can easily trigger the allergy

You’re probably right, but anecdotally, I disagree. I kept a bunch of tarantulas together with my brother and he’s allergic to everything (nuts, pollen (Grass + Trees), dust). He also has asthma an neurodermitis. But spiders never caused any issues for him. He got bombarded way more than me and even got bitten twice by OBTs, but it caused no issues for him.