brotherofurs,
When you are young and single, living at home, there is little need to carry.
But if you move out on your own, or get married and have kids, its a lot harder not to use the eruv.
If your family Rav says mutar, there is no need to assur the eruv for you. You can choose not to carry normally within the eruv without great need (which in your stage is rare).
But its a lot harder to go back.