There’s plenty of reasons why black American’s fail to succeed, but in IT, the availability of cheap H1B is absolutely a factor. I worked in a Fortune 500 company who hired a ton of engineers from historically black colleges and universities. Probably 30 engineers in our group of around 200. After 4 years many weren’t working out and were let go. Of the 30, I believe just 4 remain. Since then, the company has hired almost exclusively H1B for those positions. Was there a competitive problem with those newly minted engineers, yes. But, they were effectively replaced by H1Bs.