>>311251You need to actually read the studies to shit on them first. It's based on analyzing twins (who have similar dispositions whether raised apart or together), analyzing adopted kids (that don't share their adoptive parents traits). Look up Texas Adoption Project.
Studies also show that heritability of childhood personality is actually lower, not higher, i.e. the adult shift is towards genetic predisposition. This is exactly where the figure 30% comes from, too.
Your genetics are actually also affected by the environment (nurture) by the way, trauma, epigenetics, etc.
Not that any of this matters that extremely, your Big Five results don't define your entire personality, just how conscientious and neurotic you are. Nor are humans anything like dogs where the personality is bred to have extreme differences between peoples.