For instance, you’ll often hear gun-grabbers say something like: “you don’t need a gun like that for hunting”.
Would saying “I don’t recognize your right to decide what I need and don’t need” work? That’s usually my response when someone talks about my needs.
Another good reply: “Well then, I guess its a good thing I don’t care what you think.”
At the least it highlights what they are trying to do; and it’s seldom something actually sensible like “You don’t need a hundred hydrogen bombs in your garage.”