people can figure out the bias in traditional media on their own. this would lend support to the idea that people will be able to obtain and maintain a balanced idea even from the traditional media coverage, because they'll be able to see through the bias - which runs exactly counter to the spirit of the argument.so, not only is this choice clearly not REQUIRED, but it's actually detrimental to the argument.
削弱原文,既然读者自己可以辨认,那IS就没有意义了