Exactly!
They are ignoring how different spectrums of light effect the plant. The sun gives off these spectrums differently, at different locations, and at different times in the day. Also, the different soils effect how the plant grows, and its profile. I remember seeing a test showing different mineral ratios gave different profiles from the same plant cutting. One was high in thc, the other higher in cbd, and some cbn.
I do believe you can get just as good bud inside, but too many people have no idea how to do this. They just assume because the bud is fresh, and green, its the best, and most potent.