So why is the Christian Church so against contraception?

One would think that because the Church is so against abortions, that it would agree with or even promote contraception. After all, killing a baby is so much worse than just preventing a baby from ever coming into existence. So why the anti-contraception movement?
Well, in an ideal world, people love each other and only have sex when they are married. These people who have sex are fully prepared to accept parenthood and would love to have a baby. Contraception promotes the opposite of this ideal world in the following ways:
- contraception promotes the idea that people can have sex without love, because if there is no chance of a child, then it is easier to sleep around
- contraception enables people can have sex before they are married because they do not have to worry about conceiving and being prepared for children
- contraception treats children as a disease to be prevented instead of a blessing that comes with sex
In this way, contraception breaks down the teachings of the Church and our God. Though this is true, it is not as though contraception is always evil.
Because our world is not ideal.
So if contraception must be used, then use common sense. Obviously contraception is superior to abortion. Obviously there is leeway and interpretation to take into account during certain cases. For example: What if you are a married woman, but you aren't prepared to have children? Though the Church would rather you treat children like a blessing and a gift, there are special cases which prevent woman from safely having children. Whether the mother had clinical issues or the family cannot support another child, sometimes contraception is alright. Sometimes contraception can even be the best choice.
But before deciding on contraception, pray. If a person prays, researches, talks to their religious leader, and tries as hard as he/she can to review all options, then perhaps somehow contraception can be avoided. But if contraception is the only option, then so be it. God is not going to hate you for choosing the best option; He is loving and caring and compassionate. He will understand if contraception is the best choice.