Why do most of the contestants and winners of Miss Nepal beauty pageant belong to BCN (Bahun Chhetri Newar) trio of ethnicities?
My tentative answer is that they are the most privileged groups in the country, and the pageant is of the BCN, by the BCN, for the BCN!
White privilege is something a white person enjoys by virtue of his/her skin color. No white person gets discriminated BECAUSE of his/her white skin color, the way a non-white person frequently is, for instance. No white person is denied something BECAUSE of his/her skin color, the way a non-white person frequently is, to give another example.
Structural privilege in Nepal is Khas privilege and, as such, enjoyed by all Khas Nepalese. No Khas Nepalese suffer BECAUSE they are Khas. That is a privilege ALL Khas enjoy. Non-Khas Nepalese, however, suffer in a number of ways BECAUSE they are non-Khas.
Social structure propped up, supported and perpetuated by Nepal's very highly patriarchal caste system has given rise to a bureaucractic and political--and other--systems that's characterized by deplorable structural inequality, which many of those responsible aren't able to understand or, if they do, will not acknowledge.
But there is a solution!