Why does the tiny mini have to have "movement"? Not every big horse has it. If their conformation is correct that is most important.
Uhhhhh, because good movement comes almost entirely from good conformation.
Every horse has "movement", but not every horse has
good movement. Good movement is a direct reflection of good structure, or good conformation! If the parts and pieces aren't made like they're supposed to be or if the parts and pieces aren't where they're supposed to be, you don't have a good horse and that horse probably won't have good movement.