Who are these people? Most of the people I know admit that healthcare is jacked up around here, and they're paying a lot without getting a lot back because of Big Pharma, government subsidies, etc., and sure don't comment on (dis)advantages compared to the Canadian system when most of us are just trying to figure out how the hell our own healthcare system (doesn't) work...Many Americans love trying to point out that their health insurance isn't actually a lot of money and it's waaay better than the system we have in Canada.
I sometimes get the impression it's a response to outsiders when they criticize the system. Like how people will critize their own family but when somebody else says something all of a sudden their family is amazing. I've had people talk about how terrible waiting times are here and how their monthly payment isn't that much. Or the common bit about how we pay all our money in taxes. How there is programs that help the poor so it's not actually that bad. Personally, I always think our system is better since I know my family wouldn't have a roof over our heads without it but just how bad the American system is has been downplayed a decent amount over the years.