Most Marriages under 30

The article explained that most babies born today are created by mother's unmarried and under the average  age of thirty. I personally do not care because the women can do whatever they want because they are grown and usually are over the age of 21. But I really do not understand why people are making a big about adults having unprotected sex. I know plenty of people that had a sucessful parenthood experience and they had kids before they were married.I like the fact that people are starting to be aware of all the babies being born to unmarried families but it really does not matter because again they are adults and they  can do what ever their heart desires. But on the other hand there are those traditional families that believe that marriage is the first key to starting a family. My mother said that I should get married before I start my   family. I really do not know what I am really going to do when I start a family, I might just wait to have kids and get married.I know one thing is for sure, I might wait until I am like thirty to start having kids, but  until then, I am going to stay protected, no doubt in my mind I am not going to change this descion. But  back  to the article, the scientists are full of tested information but what I do not understand is why they would take out the time to figure out this information? Why didn't they do a study on the average children being born by women at the age of 21 or something like that.