You know that it still matters for them whether they believe it or not? Maybe one day you'll see that Christians are called to be salt and light to a fallen world and start applying scripture in your dealings with those who are lost in it so they can get God's viewpoint and, whether quickly or slowly, begin to fix their issues.
Behavioral psychologists assert that many people need to hear new information repeatedly before it registers with them in a way that influences their behavior. It's also observed that many a scoffer stopped scoffing at some point in their life as a result of reaping the consequences of their sin and turned to God who brought a remembrance of what Christians had told them.
I don't have any problem with making birth control available to people. I do have a problem with removing God's message of abstinence before heterosexual monogamous marriage and failing to counsel them as to the negative aspects of engaging in sexual immorality with other people outside of a heterosexual monogamous marriage because that's what God wants and what people need to hear.
How will they preach unless they are sent? Just as it is written, "HOW BEAUTIFUL ARE THE FEET OF THOSE WHO BRING GOOD NEWS OF GOOD THINGS!" -Romans 10:15
I understand that not everyone gets on base first time up to bat Nautilus. But it's important they understand they need to get on base.