Why is South Africa not interested in compulsory licences?

Under the South African Patents Act 57 of 1978, the South African government is able to acquire or make use of a patent. However, the government has never made use of these provisions in order to free itself from the limited monopoly granted to a patentee, despite the challenges the country has faced in the area of medicine such as during the HIV/AIDS crisis in the early 2000s when the HIV/AIDS epidemic accelerated. In 2018, there were approximately  7.7 million people now living with the virus in the country.