Your question makes the assumption that wild inorganic crops have growth stages. Wild inorganic, or organic, crops only have one stage. There are no growth stages. And thus, the need for light is invalid.
I was thinking about why a seed that drops from a plant that grows in the dark (and as you pointed out in 1 stage) will then only grown in bright light in many stages!
Granted I may be overthinking, but it seems inconsistent.