Doesn't matter, such things threaten the horse investor lock in economics.
Many years past, and early bit of software from my student days was a side project making an easy to use database system for a horse stud farm, high status stallions being put to mares with the feed, vet visits, results, etc. all logged.
Horse racing is pretty much all about pedigree - without the lineage horses are considered valueless by the industry - super fast back country waler crosses might be acceptable for a four mile charge across open ground onto machine gun nests .. but w/out that pedigree <shrug> no Lord or up and coming billionaire is going to syndicate that horse for racing.
I imagine Polo to be much the same, in the rich set. Probably more open and accepting out on the steppes knocking about the heads of the vanquished.
Humans riding racing robots id watch, but not horse racing.
Imagine 10,000 Albert Einsteins and John von Neumanns working together with modern AI on medical, scientific, and societal issues.
Though there could be an Evil Einstein due to upbringing or something.
The stories make me wonder if Argentina is a cloning hotspot, though I may be reading too much into two stories.