Itsallgoingtobefine Original" horses, living in wild herds, had exactly the same anatomy as modern day horses
You are seriously telling me that a thoroughbred and a Przewalski's horse are identical?
Anatomically, yes, of course they are. That's why Przewalski's horse was able to be back bred in order to resurrect the breed, after it became extinct.
As identical a species as a supermodel and a short arse. Theres far more ways in which a horse can break a leg than falling or running. Conformational faults, such as being over at the knee, which Przewalski's horse is not unknown for, certainly predispose. TBs actually have fairly good conformation, particularly NH and sprint types, and are often used still as foundation stock for sports horses in other spheres. e.g. nice short cannon bones, strong tendons, well sprung rib cages providing plenty of heart room, strong hindquarters, sloping shoulders, etc.. Modern warmbloods still bring in good quality TBs to improve the quality from time to time.
I see that another poster also suggested that you educate yourself as to how horses run and jump in the wild or at play. You answered: That's really interesting! Can you link me to the footage of horses running the Grand National course (or any course) when left to their own devices?
Aside from the fact that anyone who by very strange chance has missed the multiple examples of footage showing this, could you please just learn how to use some internet search engines? Or maybe even take up riding, if you want to criticise those who do? Better still, do something that is actually useful (such as contributing to a rehoming of racehorses charity or driving less - one of the biggest dangers to my horses' welfare I face even on the very quiet rural roads around me is speeding drivers), but do something more useful that posting utter drivel on an internet site!
Its a beautiful sunny afternoon. I've been up since 6.30am, feeding and mucking out then riding, and I'm just about to check my horses and poo pick their field. Later, I'll be helping spread lime then I'll be worming them and bedding them down for the night after doing evening feeds. You'll excuse me if I don't spend my afternoon producing footage for you from the internet.