No politics with horses and their genitalia, IMO.
Horses are horses, each is different within their breed and each is bred for a purpose. Draco tends to be on the hotter side. He's not as hot as an Arab. (I had an endurance-bred Arab for a bit.) I am guessing that the horses that Brownksi had while being a trail guide were bred for being more mellow. Probably Quarter Horse and Quarter Horse crosses. Maybe some draft blood thrown in. They tolerated beginners. Putting a beginner on Draco would be bad for all involved.