Why would Rand want to spend one dime appealing to you in a political ad? You don't need political ads. You're already politicized.
Just because we are so focused on politics that we don't need a commercial telling us Rand is the doctor, not the insider, and that he cares, and all the other points he's making, does not automatically make everyone else (who might have other equally important things to do) ignorant.
If everyone were as political, as focused as most of us on RPF, who would be building the bridges? Who would be making the cool video games? Who would be the stand up comedians?
This world would be boring as hell. I think the main idea of having representatives is so we don't all have to be political insiders, using all our free time in the subject.
Certainly people should become moderately informed, and seek information, not just let it fall in their lap. But if you've got your church, and you've already got your choir, who do you preach to?