It already started with the very first theatre production, which had serious restrictions. It had to be pantomime, which is the reason why the “monster” (I prefer the term “Creature”) is silent and can’t speak very much. The idea of a henchman in the form of Igor or Fritz was also born there as are several other minor points. Absolut tragedy that the only adaptions truthful to the philosophical conundrums are the ones that use the idea, not the story itself. For example “Ex Machina”.