Social liberty is different. It can also be seen in two ways. The first is as autonomy, which is a blank check for individuals on morality. The second is humanisticly, that morality is meant for individuals to lead the most fulfilling lives possible, rather than being some test to see who gets to go to Heaven.  In the second rendering gays are encouraged to marry rather than be celibate and late term abortion are allowed if they are obviously necessary.  Indeed, the whole obsession with allowable sexual pleaseure goes away.  That is what the Church growing up looks like. (It would also ordain women).