I think that is a relevant point. But if solar capacity is that much cheaper you can just build much more of it and still offset thenprice.
Germany had >80% renewables for many days this year
Are you suggesting nuclear is steerable? Because afaik it is not.
I don't see an alternative to 100% renewable + higher capacity to offset storage inefficiency. France is trying it, but it is super costly and unreliable.
The last sentence is simply incorrect. Humans can detect single photons in specific environments. https://www.nature.com/articles/ncomms12172
In real environments it depends very much on the brightness of the flash of light.