Institutions like journalism draw their authority from trust. With enough of it, journalism can become a true “fourth estate,” an independent power center with an existence separate and distinct from dueling political factions. Without at least some trust that bridges tribal lines, its authority wanes, and it can only passively report as tribalism takes over.
In the end, for building trust, there simply is no substitute for A) guild professionals with special expertise in gathering and assessing information, B) strong norms to govern their behavior, C) institutions to enforce those norms and vouchsafe good work, and D) social norms granting those professionals some transpartisan authority.
The US has lots of A, but not much of B, C, or D.