There are some situations in which contraception is necessary. As for being moral or immoral, that is a matter of opinion.
Separating sex from lifelong married commitment is really a detriment to a society, because it diminishes the basic building block institutions of marriage and family.
So, contraception, in and of itself, is amoral, but how it is used certainly a moral question.
No, it is not. It is a matter of moral judgment, as to whether something is right or wrong, just as the morality or immorality of (for example) abortion, racial discrimination, theft, adultery, and drunk driving are matters of moral judgment.
If you wish to say that there are no genuine judgments of right or wrong, that in itself is a judgment that you have made, and it's one that requires a defense, rather than simply an assertion.
This post (if I may extrapolate) demonstrates the author's point about the uselessness of "dialogue." If dialogue is only, "This is your opinion; that is my opinion," with the assumption that there is no right or wrong, it's a waste of time. Useful dialogue would start with the premise that there is a right and wrong, which we can determine using our reason, and that all the parties involved are interested in finding the truth and living according to it.
In the absence of that bedrock principle - which is the ambient state of our society - exhortation is what is needed, especially from our clergy.
My years have taught me that the litmus test of a REAL Christian is marriage and birth control. Real Christians stay married till death and have as many children as God sends. They don't use birth control. If I see a person who calls themselves Christian and is divorced and remarried, I know that they are hypocrites. If I see a couple with no children because they use birth control, I know they have not God's Grace.
How many Christians like that do any of you know? FEW!
I agree that there are some situations in which contraception is necessary and good. In all those situations, contraception, like sex, is for a husband and wife who have circumstances which call for the prevention of a pregnancy. The married couple should make the decisions about contraception for themselves, with advice from others only if the couple requests it.
I do not believe that sex or contraception is right outside of marriage.