The studio photographer moves a few curtains or turns on his lamps to be independent from exterior lighting condition. For if they spend the money, the majority of clients wants to see themselves not life-like, but interesting at all costs. The lighting choice is dependent on this too. The necessary schemes can easily be found in celebrity picture-postcards. And if one has practiced these things hundreds of times, it works without effort.
Nothing can really go wrong.
It borders on mental acrobatics and is often not less dangerous than artistic acrobatics to deal with such conditions in the context of simple photographic technology. Furthermore, close-ups true to the material require an extraordinary technical skill on the part of the industrial photographer. Added are the already mentioned physical strains. This might also be the case because the industrial specialist, like the workers, often cannot remain very clean when he works and takes photographs of dirty things. Dirt from work, however, can make someone lose prestige in the eyes of foolish people.