"Put it differently, why do we continue to cheer for Makhosi Khoza and Mondli Gungubele and others?" It is because they chose the moral high ground, knowing fully well that their actions might actually get them expelled from the party. They are endangering their livelihood in preference for honesty, which many people in and out of the party are incapable of. We cheer them for their courage and exemplary behaviour. You should try that sometimes.