We even learn at school that no writing can be objective since humans write them but what matters is to identify ideological stances and read enough subjective angles to have at least an opinion on where stakeholders stand if not "the truth"?
Do you really think that people who write about politics can ever resist the urge to try to shape politics?
Why would a government journalist be any better?
Another threat is foreign ownership of media. In Poland, where public media is explicitly controlled by whatever ruling party happens to be in power, there was recently a big media circus around introducing some media investment restrictions by foreign companies. Over 80% of Polish media are foreign owned, much of it in German hands, but not only. Best of all, it's not presented as representing the interests of those countries or groups. That's a huge problem for national security and a symptom of the neocolonial control the country is under (Piketty once described Poland as "foreign-owned"). Recent media brouhaha was triggered by an American media company (owned by Discovery). It's one thing to read about another POV. It's another to have foreign interests presented as your own and concealing their true nature. The Western media meanwhile routinely convince the Western public that anything against Western oligarchic interest in that region is fascist and other favorite epithets. They groom the public to view what's happening in a way that is untrue and benefits oligarchs. Colonialism still exists. We just call it other things now.
Also, divisiveness is not the primary problem, but downstream. If we focus on division, we risk throwing truth under the bus, especially in this climate of subjectivist "narratives". We are vulnerable to saying "to heal divisions, we must accept a common narrative". Heh, sorry, nope. That's the tyranny of the lie and the narrative makers (hence the foaming at the mouth by those who are losing control of the "official narrative"). The only thing worth uniting around is something true and something capable and worthy enough to function as a unifier. You need enough in common to create a workable society where coexistence and cooperation are possible. If we can't find something like that, then sorry, but you have no viable society.
China is more extreme, and more explicit about the link between politics and media, but it's broadly speaking the same system.
PS: this is especially true of countries like the UK, where extremely stringent and abusable libel laws regularly cause financial troubles for small presses that upset powerful people.