Sadly, the only way I can imagine to obtain experimental confirmation of this hypothesis would be unworkable.
It would be necessary to take a population of infants, raise them in strict isolation and teach them nothing of religion, carefully excluding anything that even hints at the concept, while giving them the scientific method and lots of understanding of reality otherwise. Then allow them to develop their own civilization and monitor them for several centuries to see if the concept ever emerges.
The mods made under these rules seem guaranteed to be shittier than others.
Appearance and armor mods are out - no Bodyslide. Vast amounts of mods are dependent on SKSE, so those are out. A lot of the coolest stuff these days is possible only with SPID and other such frameworks for mods to use. Those are out.
So, either this will cause a significant decline in mod quality if modders actually try to build for it (to say nothing of the cost - even at $0.50 per mod some of my installs would cost $500+)...or most modders will ignore it, and it'll go unused, cause it's too hard to make good mods under these limits.