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Correcting these problems would involve pretty significant tradeoffs. For example, lowering medical costs includes improving public fitness, which will be branded as fat shaming. Improving maternal outcomes includes health education for girls that makes maternity a major focus, at odds with American feminism. Combating drug addiction involves strengthening borders. Reducing gun violence means discouraging fatherlessness and educating boys to maintain self control at all times, aka "toxic masculinity".

Note that I am not saying that these are the only causes of the problems you mentioned, but they are significant. And I agree that you can go to far with these and sometimes being more free / subject to less societal pressure to conform is worth sacrifices in health and safety. Just so long as we understand the tradeoffs and don't blindly look at perceived benefits of other countries without also looking at sacrifices made for these benefits.