In world rankings US typically ranks dead last in a lot of metrics. Guess who ranks right next to them? That’s basically the problem, we’re so obsessed with the fact that we have it better than the US we aren’t willing to look at other countries and what they do better. As long as we don’t have “US style” healthcare that’s good enough for most people here.
People say it in person a lot. Another factor might be that some people view it coming across as either non genuine or passive aggressive in written form.