Without liberty, no society can sustain the want to live, in the long term - look at the depression rates in Communist North Korea. Without violating the Golden Rule, such a situation would not have arisen.
If they could, then slavery would be good, right? The question is which is the higher moral value. Which derives its value from the other.
Did liberty have more value for Patrick Henry than survival? Do those who prefer slavery to death have higher or lower values?