How do models have so shiny hair despite dyeing it so many times? I only dyed mine 2 times permanently with box dye, one time bleached?

I mean runway models like Snejana Onopka, Vlada roslyakova etc. . How is their hair look so shiny healhy and not dry? Im jealous **T

How do models have so shiny hair despite dyeing it so many times? I only dyed mine 2 times permanently with box dye, one time bleached?
Post Opinion