The negative response from fellow Nepalese here blows my mind.
When you start argument about being fair or not, you should know that nothing is fair or right, those with right ability at right time just make it righteous.
The very fact that you have food in your table but millions of children in the world stay hungry is very unfair, those children work equally hard or even more than you, but they were just born under unfortunate circumstances. Should we make it fair by throwing you and your kids in the middle of desert? 
Or you think you were smarter than others that you deserved better life? Well ,guess what, if you look around there are plenty of people who can make you look dumb. 
Is it fair that some guy from village just wins DV and gets citizenship while there are people struggling here with perfect history?
You should not point fingers at someone just because you were lucky , because when you do so, there are luckier ones, who will make you feel similar if not worse.