It is human nature at work. Everybody thinks that some old breeder that hasn't made an outcross in twenty years is some kind of backwards rube. They think that thanks to their genius abilities and legendary use of the internet, they can cross four lines from four different parts of the country and they will have something better than any of the stock they started with and therefore more valuable. For the sanctity of breeds and the preservation of traits, pen and paper was a much better form of communication. Gave people a chance to think things through before potentially ruining their stock.
We keep a lot more breeder birds than most folks do, to try to avoid narrowing down the genetics pool too much, too fast. There is only about 3 strains of our chicken breed left in the country that date back farther than about 10-15 years. We've got two of the strains and keep 3 different cocks for each strain. It's a pain in the butt to have so many pens, but I'd rather do that, than start seeing a lot of congenital problems cropping up in just a few years. I've seen that poultry can take more inbreeding than other animals, but I'd still like to make sure we keep as much diversity as we can. Which means improving traits is really slow going but we have seen improvement in just a few years, so I'm ok with continuing to go slow. I may eventually cross the strains, one strain is currently lousy layers compared to the other, but I'm still trying to give them a chance. And if I do cross the strains, I will still continue to keep separate bloodlines in addition to the crossed one. Since so few folks keep the kind of chickens we do, so there isn't a lot of info out there about breeding them, it has been very helpful to see the differences in the bloodlines as well as the groups with different sires, to compare them and learn.