That overlooks the 27 million uninsured Americans. Uninsured cancer patients are more likely to be diagnosed at a late stage, less likely to receive treatment, and have substantially higher mortality than insured patients.[1] They also have worse survival, even after accounting for cancer stage.[2] So excellent U.S. outcomes among those who access care don't rule out preventable deaths caused by barriers to accessing it.
[1] https://pubmed.ncbi.nlm.nih.gov/25092774/ [2] https://doi.org/10.3322/caac.21732