Because life with horses is never orderly.
Majikal Breeding
Because we all want a horse that farts rainbows and butterflies, right? I know I sure do; it’d make cleaning stalls amazing. In any case, while I like many rare and/or trendy breeds (think Friesians and Gypsy Vanners), I feel like they are sadly the victims of people with marketing degrees and no horse sense blowing their popularity through the roof (usually for absurd reasons like color or long manes/tails) which results in them being overbred and in many cases dumped when their popularity wears off (usually because they’re more attractive to people looking for the novelty of the horse rather than its ability to compete in a given discipline).