Because there's no way that a Communist dictatorship would ever lie about that.

People complaining about low metrics in Cuba (quality of life, income, etc.). When being offered other metrics as counterpoints (like life expectancy) they conveniently dismiss it as being made up by the state. Really Cuba can't win.

Cuba scores well on a number of health indicators. Another latin american country, Mexico, also has high life expectancy (77yrs).

iirc, Cuba's health success is due to its socialized health care.

Yes, which was one of Fidel Castro's policies enacted in the 1976 constitution.