Thats not what I am saying for the most part, those extreme hybrids are all coming from line bred stock, whether its skunk or nl or g13 or on and on, and as for mutants in quotes, I didnt refer to deletorious, I meant boring, too much variation.
Beyond that, lines like OG have basically been line bred as well as other avenues obviously, even though they werent the product of said method. Most of the bagseed elites have become defacto filial lines, maybe not....
I was just trying to suss more of your reasoning on the line breeding, you took it a different direction, although I heavily agree with all of what you stated, although its a bit off topic...
Maybe a better question is why not line bred? Ease, better chemotype/phenotype sequestering?