What does "went through INS" mean? What papers or visa did your dad have that gave him the right to live here, and how was it meaningly different from an H1-B ?
It took us 10 years of constant applying, thousands of dollars spent before we got our green cards. I still remember my interview because I got my green card in 2015 and it was the most invasive thing I've ever gone through. I still even remember all the interviews we had to do before we got our visas to come to America.
In my opinion, I don't think OP really knows how difficult it is to get to America in the first place as an immigrant. It's not as simple as the media makes it out to be.