What makes you so certain that this valuable research showing weaknesses in today's systems will render the C2PA concept useless forever?
Yes, software LPEs are a risk -- as they are in every nontrivial computer system. New ones will appear, and old ones will be closed in time, as TFA acknowledges.
Re hardware attacks: The (neat!) glitch injection attack the author describes in the linked "lighter" page only raises the implementation cost of doing image certification properly. For example, if the camera module presented only an interface that dumped raw RGB or JPEG-encoded data plus a digital signature that used a private key known only to the manufacturer, then all that would be required to verify a "downstream" image would be to keep a copy of those original bytes inside the final (potentially cropped, filtered, AI-ed, etc.) image, in the worst case roughly doubling its size on disk (though certainly more efficient schemes could be designed). Any interested third party could then compare the original and final images by eye and decide for themselves whether or not the subsequent processing materially changed the image's "meaning".
Finally: Does the existence of lock picks or bolt cutters render padlocks pointless today? Does it corrode society by encouraging people to mistakenly believe that anything they put behind a $5 padlock will be safe forever? No, and no.
This is yet another of these absolutely caustic takes that come with a veneer of intellectualism, but actually just ignorantly deconstruct reality.
Each of them weaponizing the rules of the platform that (for sensible reasons) demand you engage with the strongest interpretation of the message/argument you see.
The asymmetry of effort there is unsustainable, and that's exactly the point.
No idea how that could be solved. Maybe a meta comment like this one helps.