^^^No he wants to not have to deal with getting a lame pheno from a pack of beans. And as much as I love TGA, they are some of the more varying beans out there. Although some of the newer stains are more uniformal.
In CA most people grow clones. And in CA there are many people(greengenes) who do nothing but clone for the masses. They are not "extra" clones. Yes, you have to rely on that cloners judgment and personal taste(why they kept it), but it is probably worth it over wasting veg and selection time. If you are looking for that 1 in a million pheno then never trust someone else do it your self and never give cuts out...but if you need clones of a standard strain so that you can get a uniform run going...clones all day.
Just like anything...you can get fucked though.
This doesn't apply to jilly, but then there is the obvious reason of clone only strains, and getting clones is how you obtain them(GSC, Original OG, Blue Dream, Green Crack,...)
I have conspiracy kush (Obama Kush x SQ)...and obama kush is (bubba x urkle), and some professor chaos, going at PG's. I need to pick pheno's for both. And I should get to check on the nurse jackie mainline I did, next time I see PG.