To ascribe the acceptance of female clergy, gay marriage, and abortion to a married couple’s decision not to have ten kids is laughable.
To my understanding, before those things were accepted in every faith group, they first accepted birth control within marriage. Are there faiths groups that have accepted birth control within marriage and haven’t accepted those other things? Sure, and I hope they never do. But everyone that did first accepted birth control within marriage.
Why do you think the most liberal Catholics are the ones that hate the prohibition of birth control within marriage the most? Just like liberal Catholics hate the discipline of celibacy the most. They think it will lead to other things.
Freegards
Contracepted intercourse embeds in a society the necessary premise (my choice, and I can disconnect sex from fertility if I want) that later justifies abortion and homosexual intercourse. Both of both these accept the key premise, and --- though by a different route--- achieve this "disconnect" in a definitive way.