If the New York Post can be hacked - how reliable is media generally?

In October 2022, the New York Post was hacked - namely its website and Twitter accounts were controlled by hackers so they could provide 'disturbing fake news' with spoofed and unflattering headlines and tweets targeting members of the the US parliament. The New York said that they are investigating the causes. It has long been known that we need to mistrust "fake news" from unreliable sources. It raises the question as to whether we can rely on what we are seeing online even from bonafide media outlets.