Post is a bit misleading. First of all, who uses a soldering gun on small electronic circuit boards?
I've worked on tens of thousands of electronic items using Weller WTCP irons for over 40 years now, never had an issue. Hakko is generally the dominant and safe iron used in today's facilities. If people took a deeper dive into todays electronic BGA's & protection circuits, they wouldn't be assuming and generalizing such things.