For all the hate the US gets on Slashdot, it's still the country of record. It's hitting the big time. Top finance jobs are centered in the US. Top technology jobs are centered in the US. The movie and TV industries are largest in the US. 9 of the world's 10 best universities are in the US. Sure, such jobs are available in Nigeria, but the best most and the most talented tend to work in the US, and you're limiting your kid's future by not allowing it.
I know so, so, so many Chinese people (both PRC and Taiwan, Malaysia, etc.) killing themselves to get their kids in the US because it has the best school and the top jobs. Not to mention, my wife's parents, several of my best friend's parents, etc. NOT doing it, when it would be easy to fill out paperwork, just seems like irresponsible parenting.