<"If you are right you will still be right no matter how much discussion.">

Equally, if you are wrong you will still be wrong no matter how much discussion. 
The real issue concerns the Magisterial authority of the Church and acknowledging her Divine right and responsibility to determine that certain controversies are settled, once and for all, and are closed to further debate e.g. contraception, abortion, divorce and remarriage, homosexuality, women's ordination. 
God's unending love and mercy should not be used as a Trojan Horse to dress-up sinful lifestyle choices as acceptable by diminishing personal culpability and human freedom of will because situations are "complex", need to be "discerned" and the Church must be "pastoral".