Here's a bit of an anecdote, but I bet my family isn't alone in this type of story... my cousin died from cardiac arrest at age 45. Keeping the story here brief - he was a high-income business owner who got into a tough spot in his marriage and business, found himself without health insurance when he had a medical episode. Knew something was wrong and would likely bankrupt him - and we think that's why he didn't follow up with his doctor and was dead two weeks later. Congenital issue, could have been easily resolved - but without health insurance it was probably a death sentence either physically or financially.
Now, this was just as the ACA was coming into play - but I'd argue it's moot. The ACA was well-intentioned, but has not actually improved the insurance or care situation for the majority of Americans. I need a surgery at present that won't be covered by my insurance to any meaningful degree, and being in rural America my care options are limited. So I'll live with regular pain because the system doesn't work. And I hear stories like this in my social circles weekly.