The basis for the right which was, in part, ABSOLUTELY rooted in the idea that the because people and governments have a tendency to discriminate against you based on what you believe, then as long as you do not disclose your interests publicly, there should be no basis for discrimination. And why is this discrimination so important when NOT dealing with the government (which are nothing but glorified property protection rackets)?
Economics. Specifically, trade. That thing that mankind has been doing since before we've actually had recorded history? Whether it's bartering or seashells or labor or whatever, it's an essential part of being human, because it's how you get things you need to survive.
Again, we do not assign rights for which we cannot find a real purpose. You cannot be a functioning human being in a society without economic activity, whether you perform it or someone performs it on behalf of you.
You're flat out wrong.