Not the OP but I typically hear such advice in the form of thinking of oneself and one's circumstances as being entirely one's responsibility.

>What if I wanted to be healthy, but have $<any number of chronic, debilitating conditions with no clear identified cause, mechanism, and or cure>?

Then the person in the hypothetical would need to decide to define healthy realistically for their condition. While it may be something you want, wanting something impossible is a non-starter.

>one of the hosts had an extremely distressing time trying to attribute why her abnormal mammogram result wasn't being followed up on by her doctor, despite daily calls for two weeks

Great example, in this case the host can decide to call another doctor's office to get a second opinion. Or following up in person. Or escalating to that doctor's leadership/board.