The most likely function of the last sentence in the fourth paragraph ("In other words... anyone") is to emphasize that no one is safe until health care is improved.
What is the purpose?
The sentence directly follows a list of specific examples of healthcare injustices and inequalities. This suggests its purpose is to draw a broader conclusion from the evidence presented.
Also, the phrase "anyone" emphasizes universality. It transcends the specific examples and implies that regardless of social standing, income, or existing health conditions, everyone is vulnerable to the shortcomings of the healthcare system.