Actually, virtually all "creation scientists" say it DID happen. The "horse kind" (Family Equidae) is the single most commonly cited example of a "baramin" or "originally created 'kind'."
IOW, creationists DO accept the common ancestry of all equids. (At most casting off only the earliest members of the group.) Apparently, however, their lay followers don't pick up on this.
I agree with you, I just don’t like the word “evolution” - I prefer “speciation.” The party line on equine evolution does not match the fossil record. I am familiar with baraminology, and agree...I just don’t want to associate it with creation.