But real horse lovers care. Nothing but a fragment. Ace's photo is the common misconception that old horses are beat down and broken. Sure, Ace was, but it wasn't his fault. All abused animals are the same, and can only react violently out of fear for so long before they just lose hope and give up.
All horses vary.
Begin training with experienced trainer. Very experienced trainer may ride, good racing age. Racers retire very early, so although they are worked hard, they have an easy life afterwards, so many thoroughbreds you hear about and admire are young. Broodmare is still a bit young, something may go wrong. Good for experienced horseperson.