I agree, some breeders could be doing a better job. But some strains are just very hard to stabilize. How long has White Widow been around and on many sites you will see a note that it's not 100% stable. I've grown it several times and have had about 3 different phenos every grow. So it's not always so straight forward as one might think. I've also seen some odd phenos pop up on autos that were otherwise stable. I'm no expert but it seems that some of those 17 different phenos are very recessive and still pop up once in awhile. One, in particular is very odd. I've seen it twice in my own grows and a couple of times on here. It's a very tall, leggy one that has very loose, sativa like buds. The yield is very poor and the THC content is low. Certainly not a desirable pheno. My old friend Nelson, may he rest in peace, had under taken a project to stabilize Mi5. If memory serves me, he worked it for 5 or 6 generations beyond what the breeder had done, so probably to F11 or 12 at least, and still couldn't get it 100% stable.