I am not really assuming anything about the breeders...I just dont like the idea of breeding mixes for sport. Just not something I could support. I think there are plenty of already standing breeds and mixes that are perfectly capable of excelling at them. To each their own.
I just don't feel that sport mixes are necessary, when there are HUNDREDS of breeds to choose from. Why not just import a rare breed and work to improve that breed? On my Flyball team, two of the members imported their own Danish Farmdogs, and started a long line of amazing Flyball dogs from their dogs. There were only a handful of Danish Farmdogs in the states before, and they've helped popularize the breed while also bettering it.
To me, a mixed breeding (especially F1, which most of these are) is simply not going to produce consistent puppies with consistent temperaments or type. That is why we have purebreds. I don't know about other states or cities, but you can find ANY kind of mix in shelters in California. Bostonjacks, Borderstaffs, Borderjacks, Jacks, and an assortment of other small/medium hyper dogs who nobody wants. NOBODY! Fostering for BC Rescue, I met countless small, high drive BC mixes who were nearly impossible to adopt out because they were super active & awkward looking & mostly black. I would imagine that it'd be cheaper to adopt a dog from across the country and ship/drive it home than it would be to buy from a sportmix breeder.
Having grown up, basically, doing Flyball... I know too many sportmix breeders who just put their Jack together with their friend's Border Collie and voila!!! To me, that's the reality and the norm. It's great that people do temperament/health testing on their mutts but in the end, mutts do not produce consistently! Plus the fact that I really understand Border Collies, and intentionally mixing them with completely different breeds with different personalities and instincts I feel is not fair to the dogs. Generally, unless mixed with another herding breed, BC mixes are confused, awkward dogs. When this country has a shortage of homeless dogs & breeding dogs for fun is okay and doesn't have reprecussions, I'll be fine with sportmix breeding. I'm not going to hate on anyone for buying a sportmix but I don't support it. I feel that all that time & energy would be so much better spent rescuing or bettering a purebred breed of dog.