> Whatever you do, be intentional and do it because it's the right thing for you to do in your life
I'm not going to morally judge someone for benign lifestyle decisions, but it's baldly not true that someone can just live whatever life one wants without affecting the people around them.
Keeping your kids out of school, verbal abuse, avoiding vaccinations, trapping people into relationships with pregnancies, running out on child support, substance abuse during pregnancy, unprotected sex with strangers ... there are clearly things that are intentional and (ignorantly) someone's right to do. And they are clearly the wrong thing to do, for the individuals involved and for society at large.
I realize that you probably didn't mean to include all those decisions as valid in your sweeping case for non-judgemental social norms, but the fact is that norms are incredibly important because, especially when it comes to family, decisions do affect other people. If we can agree that some norms are important, the only discussion is about which are important, why, and how much.
I'll go one further and defend social diktat since it's probably not something most people consider. Given that norms are important, I'd rather people enforce these norms outside of the laws. The norm used to be that gay sex was a bad idea. People were (and are) thrown into prison and legally executed because people decided to turn social norms into laws. Since norms are greatly affected by technology and culture, keeping enforcement confined to social pressure provides a level of protection to people who decide to try something outside-the-box.