it could be genetics, me and my bro grew some gg4 a while ago that literally had no smell i was so pissed.......
when me and my brother burly started growing weed indoors a long time ago for the first 2 years that we grew it sucked... we used HPS lights with fox farms fertilizer and everything we grew for the first 2 years was not good. didnt smell good. didnt get you stoned.....
we eventually started adding solis tek 10k metal halides too the mix and everything changed!
my 2 cents the plant has receptors the mistake that i see alot of growers make is the grow lights they have are great at making chlorophyll receptors turn photons into electrons right?
But the grow lights that they use usually do not stimulate UVR8 receptors with UV spectra, thus leaving terpene profiles and THC potency on the table.