If I was a Model Agency and I was interviewing a potential model, absolutely. I would ask them to adjust to whatever demographic I was targeting to make the most sales of my product. (Raiding analogy, pretty good eh)
Similar to how things need to be within reason with healing and DPSing, if I asked that same model to have plastic surgery performed completely altering their identity in order to work for my agency (so much though that they actually became a DPS) that is a bit extreme.
Now if that person wants to head off to the modelling forums and tell everyone how toxic the modelling industry is instead of getting a job with my company (instead of brushing their hair and teeth and maybe putting on some lipstick) there are tons of Barbie dolls that are lined up to take their spot.
Such a weird comparison, and I felt kind of silly even doing it, but hey I'm bored at work.