For the first - American training for physicians is widely considered to be some of the best in the world, and those who can afford to receive comprehensive care from American physicians benefit. Here you are attempting to evaluate physician quality by public health outcomes, which is incorrect, as physician quality plays only a minor role when talking about infant mortality, average life span, people with chronic diseases, etc.. Those are measures of access to health care, health care education, nutrition, etc., at which our performance is woeful.
For the second - Again, you're using public health measures to evaluate quality of care. That's all well and good, but those are not the measures with which Republicans typically would concern themselves when evaluating quality of care available. You were asking how they could possibly think our health care is the best, and I told you. If you have full access to it, it is the best, and that's the measure they're using to make their determination. Public health measures are of only secondary importance to this point of view.
They're saying it's the best if you have access to it.
You're saying it's not good unless everyone has access to it.
It's a value judgment, not something you can argue by throwing public health statistics at them.