I think you've nailed the value proposition of newspapers and other hand-curated services here. When dealing with a single editorial voice their biases and a agenda are at least knowable and mostly consistent. Compare to "crowdsourcing" where the agenda and bias you get may change day to day based on bots, advertisers, scammers, and online mobs gaming the system. Likewise "deep learning" makes decisions based on an algorithm unlike that of any human and is not easily easily pinned down to a consistent agenda either.
Twitter's a bit different, there are good reporters on the ground who tweet a lot, but Twitter is terrible at actual aggregation.
Honestly, a dedicated newsroom is better.
Anyway, they're single voices, not a variety. So bubble.
The world is full of domain experts who all know the journalists get everything wrong about their specialty, but out of misguided charity think its just an odd mistake and journalists in general know everything about every OTHER specialty and can't wait to read those stories.
I'd love to read tech journalism from someone who has run a compiler on source code they themselves wrote. Its out there, but not at mainstream prestigious sites where all that matters is class rank at Columbia.
The problem with newspapers is we have more than about 3. Back when they printed and delivered paper scaling meant we have 1000 substandard local papers all of which equally suck. Someday we'll have like 3 and they'll actually be worth reading. But a lot of jobs have to go away first.
That's going to have interesting effect on journalism schools. Can you even run one, if there's only three small employers? May go back to the days when most journalists have a degree in something else.
I've certainly experienced the Gell-Mann Amnesia effect myself (for years!), but each bump up against the practice of modern journalism makes me a little bit more disillusioned (and sad, because it is surely an important function.)
The US press are more subtly handicapped by believing that the midpoint between partisans is "balanced". The Trump campaign is showing how ridiculous this can become.
Go read the IT section of your local paper and see if you still think that.