I think it has to do with were the seeds were found.
Ifg the plants had alot of spider mites. Which any affy strain did.
Most likely being from the hot dry desert like were I live. So spider mites are evrywhere. So I think the plant developes a spice to it. That earthyness.
I've noticed all my strains that are spicey or earthy don't get fucked with. Onl;y the sweet pplants get distroyed.
So when picking a strain. If SMites are a problem. Get a spicey strain. Like Kush or Haze.