Only that you have no experience with Left bias. That's not because you're stupid, that's because you live in a country where the medja is corporate-sanitized. If the Left were truly represented, you might fall out of love with corporations. Clearly, corporate owned media outlets in this country (and that'd be all of them) are not going to run the risk of the great unwashed falling out of love with them.

That's all. You're not stupid, just under-exposed.