they dont fly models to random cities just because a photographer want to shoot them ; you'd need a reason for that. that reason being money so strictly linked to fashion. we call these "editorials" -> made for magazines (where you showcase outfits, beauty products, shoes etc...). that's the job of a casting agent, they reunite a photographer, stylist, set person, makeup artist etc to work on an editorial. the photographer, most of the time, has very little importance in the choice of who they shoot during those editorials. and i'm not a fashion photographer
me directly asking ron to come to my studio could work if i lived in israel like he does. i would then only need to message his agent first and that would be that, because then no money for traveling would be involved.
but that's not the case. the money spent on a plane ticket and hotel need to be justified, so does the time spent away from the model's home country/town. it needs to be lucrative. a model doesn't fly away to paris for free like that if there's no job opportunities