I don't need first-hand experience, just statistics. The US has a lower overall percentage of patient deaths than countries with socialized healthcare. The US has shorter average wait times than countries with socialized healthcare. Even Canada is starting to realize the value of privatized healthcare, and is starting to allow more of it.
Regarding your chart for life expectancy, that does not directly correlate to healthcare, the same way a statistic on patient mortality would. More likely than not, it is a result of American people having poor nutritional habits.
I'm not against people getting healthcare, education, and good working environments. In fact, I strongly support all three of those things. I disagree with socialism for both practical and principled reasons. Socialism is both immoral (due to being funded by involuntary payment, and relying on coercion and control), and idiotic (due to the economic calculation problem, among other reasons).