Why not simply be humble and accept what has been taught by the Church for centuries, through scripture, tradition, patristics , councils and exegesis.

Nobody is advocating biblical literalism, just that the Church sticks to objective moral truths. If these truths are subject to the changes in human society, then they are not truths an are merely relativistic constructs.  If we reach that point why even bother with religion, it is meaningless and useless without objectively true teachings. 

In any case, the church has not made a bigger case about divorce than helping the poor, it is tone of the largest charity provider when it comes to NGO's. This did not happen overnight, people have heard the gospel for centuries. The issue is that helping the poor has never been contested as much as divorce. It is narrow path of the cross that people object to when it requires uniting our deepest sacrifices to our Lords.

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