Most advanced nations have healthcare as a right, so the unicorn exists. We spend more per person and per GDP than the UK, Germany, France, and Canada.
Then we get into the "well, they have to wait". So do we. If I wake up ill on Tuesday I can't possibly get in to my PCP. IU Health has a "walk-in "clinic, and if I am online by 7 I have a good shot at getting in that day. I quoted walk-in because it is tough to get in by walking in, one needs to schedule. Same for the west side non-IU "walk-in". Now some days are better, looking at the schedule for today, the save a spot in Bloomington is full for today.
If you injure yourself playing basketball at noon, the chances of someone in Bloomington getting you in that day are small. I am sure somewhere there is a private practice that might have room.
My wife's knee replacement had to be scheduled many weeks out because Bloomington's IU hospital lacked enough beds, and she had some risk factors that made it best to stay overnight. There were stories in the paper of overcrowding, ER patients spending nights on gurneys in hallways. Bloomington isn't huge, but it isn't totally rural either.
Five of the 11 IU walk-in clinics have waits of over 2 hours. I know from past experience that means there is a chance they actually will not get to someone if they came in now as that 2-hour wait is wildly optimistic given they have a lower priority than the people who scheduled and the schedules are full/mostly full. Heck, I've waited 2 hours while on the scheduled list.
There are trade-offs. Somehow though other countries pay less and have fairly universal care. And there wait times may be worse, I don't know how to really compare that. But we certainly have wait times.