It's interesting hoe jockeys and horses have such a symbiosis. I couldn't imagine Chrome without Espinosa, nor Zenyatta without Mike Smith. Same with Rosie and Untapable.
I think Smith would have been a good fit for Untapable.
We will never know.
"And Allah took a handful of southerly wind, blew His breath upon it, and created the horse.... Thou shall fly without wings, and conquer without any sword. Oh, horse" - old Bedouin saying.