Exactly. It is much like the Jews under Nazism or people under the Soviet Union.
It is difficult to obain visas to leave, at all. It is illegal to leave with significant assets.
People are finding ways to do it. As they do, the government becomes aware of those ways and works to shut those "loopholes".
One way was to purchase a substantial oceangoing vessel. Then sail it to another country, and sell it there.
I recently heard of a South African family that sailed a 30 foot boat to South America from South Africa.
That is a small boat to make a transatlantic voyage.
Didn’t the leader of South Africa go to visit the leader of Venezuela to see how to get rid of people he doesn’t like?
South Africans can leave the country and emigrate to other countries.
In 2017 210,000 South Africans moved to the UK.
190,000 South Africans moved to Australia.
100,000 South Africans immigrated to the United States.