I think a citation is needed for "Americans regularly avoid care ... because they can’t afford it."
I think there are other reasons, e.g. they don't like doctors, or it's too inconvenient, or waiting times are too long. I have good insurance and haven't seen a doctor in probably 20 years.
I know people who are visiting the doctor for every sore throat, ache and pain or sneeze and sniffle, and that's not me at all.
Here you go, a recent survey: https://www.jgwentworth.com/resources/medical-emergency
> The survey showed that over nine in ten (92%) of insured respondents had delayed or avoided medical care because of concern about cost.
> In fact, 95% of those surveyed said a medical emergency would likely put them into serious debt even with insurance.