Mexico has rampant obesity and type II diabetes. Mexicans simply do not pursue as much treatment as Americans do. It washes out in the lifespan statistics, which call into question the whole point of the healthcare enterprise.
Working in the medical field as an internal medicine physician, I'd say that focused and good-quality healthcare is vital to prolongation of life, and poorly derived, financially-motivated 'medicine as profit' is massively overrated.
Healthcare is massively overrated.