In some cultures and religions, birth control/contraception is not accepted. Many cultures believe that it is giving people a reason to have premarital sex. Many people believe that it is like having an abortion. Some people think that a child is a gift from God and that we should not prevent ourselves from having them.
I personally believe that contraception is a person's right and personal decision because a married couple may not be financially stable or ready for a child. I rather someone prevent themselves from having a child rather than have one and not take proper care of the child. I understand that many cultures have their beliefs and I totally respect that.
In my family, birth control/contraception is accepted because they do not want me or any other family members to have children that we are not able to care for properly. They do not condone premarital sex but they feel if it happens then we should use protection as well as contraception to prevent diseases and premature motherhood.