It isn't about US vs. India immigration. It is about US immigration vs. the cost/effort of starting up a company in India (by an Indian citizen).
No one's competing at this point to make it easier for "young people from African countries... to emigrate to those other countries". The low-hanging fruit is people of Indian/Chinese/whatever origin returning to their homeland and starting up the next big thing there, instead of the US.
In general, I agree with the article in that the US immigration policy is rather arrogant. It may have made sense at some point in the past, but with the distribution of opportunities changing, the US needs to make a better sales pitch.