Traditionally, humans have addressed the imbalance between energy-to-generate and energy-to-validate by building another system on top, such as one which punishes fraudsters or at least allows other individuals to efficiently disassociate from them.
Unfortunately it's not clear how this could be adapted to the internet and international commerce without harming some of the open-ness aspects we'd like to keep.
The best we can hope for is prioritizing which things are worth checking. But even that gets harder because you go looking for sources and now those are increasingly likely to be LLM spam.