And yes, the point being advanced in the thread is that compared to camping - which is generally healthy and not something to freak out about! - homes are going to be cleaner, occasional mold issues aside. So it's silly to freak out over the infinitesimally-slight chances of little Timmy and Sally getting dust-mold-smoke cancer-AIDS from a less-than-perfectly-sterile room.
Generally though, I would expect camping to be healthier than a hotel room. Hotel rooms and airbnbs are places that many humans go through, and humans are generally the main carriers of human pathogens. The only germs on your camping gear are your own ones.
