People who read "a great deal of" political news, from any source, went for Harris by 8%. People who never read any political news went for Trump by 20%.
Only if political news media is somehow a neutral, purely unbiased source that just tells plain facts, sure. "They are just not informed", "they are stupid", etc. If the media is partisan or biased, the situation reverses, and now the Harris voters are living in some media bubble with their own cnns, reddits and other friendly outposts, and then scratching their heads at the outcome in the end -- "How could this possibly be? All our polls were predicting a win. Maybe if we had 35 indictments instead of 34, that would have tipped the balance, for sure".
Much of Trump's voter base derives from people who distrust the "news". I don't blame them, and those folks would be just as quick to point out the ignorance of DNC voters, a party repeatedly shooting their supporters in the foot every election.