[iamaaditya]

I believe there is some form of memory bias or bias in reporting by the media. If you look at the record books, you will find that most records are held by Sherpas. For example, more than 70 records for Mount Everest is held my Sherpas (or other Nepalese climbers) [1], far more than climbers from any other country.

Apa Sherpa, one of the most prolific Sherpas, holds many records [2]. Interesting fact he was Sherpa to Peter Hillary (Edmund's son).

[1] https://en.wikipedia.org/wiki/List_of_Mount_Everest_records [2] https://en.wikipedia.org/wiki/Apa_Sherpa