I have been reading this article about American healthcare.
www.motherjones.com/politics/2018/01/go-fund-yourself-health-care-popularity-contest/
It says -
"With health care costs and high-deductible plans on the rise for more than a decade, medical expenses are the largest single cause of bankruptcies nationwide. Despite Obamacare’s efforts to rein in costs, the average deductible on a typical plan under the Affordable Care Act is $2,550—nearly as much as the entire monthly take-home pay of the average American worker. President Donald Trump’s efforts to destabilize Obamacare have already raised premiums, and experts predict the cost of a deductible under some versions of Republican health care legislation would rise to an average of at least $4,100."
Basically when someone has health insurance, they still have to pay a certain amount out of their own pocket. Typically they have to pay a certain amount to visit a Dr and for any treatment - with insurance covering the rest. So even someone with insurance who has a chronic or serious illness, still has to pay a substantial amount of money out on top of their insurance premiums.