The role humans play is not significant enough to deter certain genetics from expressions or showing what they made of.
And that's the main problem, when those unworked seed packs have nothing but bunk, the breeders blame the growers.
But that is illogical, every good grower or breeder will tell you, it's all in the seed, you as the grower are only there to help, not to determine anything.
I used to grow plants in all sorts of environments, from bad to worse from good to great, never a plant was bunk if it was good because it grew in sub par conditions, it was only bunk if the plant itself was bunk (DNA)
So, in my 20 years of growing I used to pee on plants, burn them, under water, over water, each time the smoke was killer, why ? cuz the breeder made sure of it.
Until recent years when seed makers just decided to stop breeding and just make seeds from every fem clone they have and not progressing any further than that in the line, just a shame.