Journalism is not our fact gathering apparatus. It is our sense making and relevance deciding apparatus based on those facts.
If we don't have good journalists providing those functions, we are left with the ersatz, AI based versions to decide what to pay attention to; twitter's, youtube's recommendation algorithms, google's ranking algorithms etc. None of which is good at saying "this is the most important thing we should pay attention right now as a society", "this is how you should approach this complex topic". Algorithms only serve one god and that is the god of engagement. But the amount of engagement they drive doesn't match their performance in affording us an ability to make sense of our world.
This is precisely what Weiss criticizes, that crucial human wisdom function is now subjugated by what those algorithms promote to be relevant; twitter being the worst offender. This makes us collectively foolish, and we see the results in our society with our inability to cohere and dialog as adults. Our collective intelligence approximates that of a tantrum throwing child, because our most used discourse engine that is twitter can only sustain that level of sophistication.