What motivates panpsychism? I am assuming that you accept the fact that you are made up of multiple living cells. I assume that you don’t regard a single cell as ‘being alive’ in the same manner that multicellular organisms are alive.
It is not a huge leap from there to suggest something similar for consciousness given that we know so very little about consciousness and that it may just be that the rudiments of consciousness exist in a singular neuron just like a single cell it rudimentary to a living organism.
Maybe a combination of emergence and panpsychism makes more sense than either alone? I would put the idea that ‘atoms’ possess consciousness as reaching the realms of fantasy simply because to say such is to equate animal consciousness not merely with a neuron but with fantasies.
Inexplicably consciousness arises. We know that much. It seems pretty clear than not all life possesses ‘consciousness’ like we do, so to call anything different ‘consciousness’ to me seems misleading.
As another comparison we could look at how human language functions compared to simple organisms that have a means of communication. In fact many other animals possess elements of what we call ‘language’ yet humans appear to be fairly unique in that they possess these elements in a combination that allows for complex communication.
Panpsychism is an interesting idea that I believe some people take way too far, or misuse the term ‘consciousness’ when talking about atoms being conscious. It is not even a theory in its current state just an idea that could potentially open up other ideas that are more applicable.
If someone puts forward a model of panpsychism I’d be interested to look at it. As is it is just philosophical speculation with some people taking it into the realms of fantasy.