[jallmann]

Exactly - content authenticity is a narrower and more tractable problem.

And I suspect in most cases that is enough - the world runs on trust, so if a reliable source (eg, the NY Times) attests that a photograph is authentic, then we can reasonably trust that. And as you noted, this chain of provenance can go all the way back to the device itself.

Fraud, on the other hand, is much harder to prove without a doubt. It is still a problem, but probably less so in the general case [1]. The concerning thing seems to be extremely targeted attacks, eg, hacking a CCTV to implicate someone in a crime.

[1] Notwithstanding folks who slurp up unfiltered content on, eg, TikTok, but the most outrageous stuff usually doesn't "make the news" on its own without more vetting. If anything, this will reinforce the importance of actual journalism, fact-checking and corroborating evidence.