edv2023,

Thanks for you valuable info and for taking time to write,

This is scary, if it is really true, I thought there will be variety of opportunities for people of all backgrounds here; The potential lack of diverse opportunities for individuals from various backgrounds in the US is indeed concerning. 

If this is true, what do most people from Nepal who come to study in US need to do, to be successful in their career apart from their time  in gas station and real estate, should they finish their undergrad in Nepal and come here for Master's or PhD instead ?

This is a very critical issue for my friends, please clarify.