That is exactly right. Both my parents were anti-apartheid, and I grew up in that environment - aware when very few were. I saw what happened to people. I saw people who my mother worked with 'have accidents.' I was told never to repeat outside the home what was spoken about inside.
So, no, i don't see people in America oppressed. In South Africa, it was impossible for a black man to reach the kind of heights like Neil deGrasse Tyson or Samuel Jackson or Kamala Harris. Just didn't happen. They were legally forbidden to be formally educated to a white man's space. They were forbidden to socialize with white people (and visa versa).
What people are talking about in America is prejudice against them - not oppression.