Didn’t the live expectancy rise continually during its existence except during the wars and 1991?

Actually, that’s the one point that isn’t accurate. The life expectancy stagnated since the 1970s, in the USSR and in Warsaw Pact states.

However, countries like Cuba continued rising in life expectancy at a steady pace (except for 1991-1994 for some reason) famously to the point of beating the United States of America.