

Dental stuff has been tested to ensure they’re biocompatible, but we still warn team members not to touch unset product even with gloved hands too much. Dentists who have a habit of wiping excess resin on the back of their gloved hands have developed contact dermatitis. Once fully cured, it is unreactive.
Fingernails are pretty inert, so it’s not as important. They’re still tested to ensure they’re not poisonous if ingested, as folks have a tendency to bite their nails.
Exposure time, vapours, biocompatibility, volume - all of these add up to make 3d resin printing pretty hazardous. Even dental 3d printing resins require this level of safe handling, until they’re fully cured.

My ex used to claim they could do X or Y task and I would make arrangements under the assumption they knew what they were talking about.
We’d get to the point they would need to utilise said skill, and they’d turn to me and say actually I thought I could wing it but I can’t, you’re going to have to do this now.
If I’d been told at the start that they didn’t know, I would have spent more time investigating the situation and upskilled myself in preparation. Instead, I’d ask “Do we have everything we need? Does this look good?”, get told it’s fine - and it wasn’t.
The lady in the article may well have deferred to his expertise when asking if she was adequately prepared, and trusted his judgement over a quick Dr Google search.