“Maybe these buses ARE elitist in some sense. But the difference between me and the people in this story is that I don’t feel a compulsion to do anything about it.”
Having the power to make a choice between public and private forms of transportation make you an elitist and thus, not a slave. Slaves aren’t allowed to make choices.
It makes her angry that people still have the freedom to make choices. She has real control issues to say the least.