I love shelties. Ill probably have one for the rest of my life. If there were no breeders, I could only get mutts. I love mutts, I have two of them. But the sheltie personality is priceless to me.
Many breeds have jobs, and it's important to maintain breed integrity.
I am VERY anti-puppymills and BYBs. Their pups are all placed, healthy, guaranteed a place for life.