Which is not a common purpose of healthcare facilities?

Healthcare facilities primarily focus on providing direct patient care, which includes treating diseases, rehabilitating individuals with injuries, and promoting medical research to advance healthcare practices. Improving health insurance, while important for the overall healthcare system, is not a direct function of healthcare facilities themselves. Instead, health insurance is generally coordinated by separate entities or agencies, such as insurance companies or government programs. Therefore, the correct answer indicates a purpose that does not align with the primary goals and functions of healthcare facilities.