Life expectancy and infant mortality rates don't really mean anything.
Well, talking specifically of advanced democracies (which the video I linked is about), I think they mean a great deal. Neither of those things is likely to imply a poor quality of life in those places.
Would you rather live to the age of 6 and starve to death, or die of cholera as an infant?
How about, live a life where I receive adequate food and medical care?
I think I'd rather die at a young age, than grow up and suffer endlessly.
Me too, but I'd rather have a fair chance at a decent life.