I think her more nuanced views on health care have been mischaracterized:
https://abc7chicago.com/post/kamala-harris-on-health-care/15084363/
Harris has previously expressed support for a single-payer health care system, sometimes referred to as "Medicare for All."
Although she initially indicated during a 2019 presidential campaign debate that she would support eliminating private health insurance, Harris walked back her support and instead unveiled her own health care plan. It called for expanding Medicare access to all Americans and setting up a 10-year transition period that would automatically enroll newborns and the uninsured, allowing doctors time to enter the system and help employers choose from federally designated programs.
The plan also preserves a role for private insurance companies, allowing Americans the option to obtain health insurance through the public Medicare plan or through a Medicare plan offered by a private insurer.