For GoldenAge and BlueBelle, yes, it's an emotive subject, but please do not taint those who have little knowledge with this ill-informed claptrap!
Apparently, lots of folk think there are horses waiting in fields to be bought to go racing? It's actually a worldwide breeding industry that produces thousands of racehorses every year, animals that would have NO life WHATSOEVER but for racing.
And, despite that misleading guff about "ill-treatment", racehorses are actually very well looked after (a sick or unwell horse is unlikely to win), with any medical issues getting them a vet visit much faster than most of us can get an NHS appointment! The vast majority of racehorses have a great life! And apparently racing is easily in the top ten employers in the UK, once all the ancillary firms are included.
Sure, occasionally bad things can happen, due to human error. How many Met Police knew about the killers in their midst? How many knew that Thatcher and the Royal Family gave the repulsive Savile a free pass to continue his disgusting behaviour? How many had a good idea about Harold Shipman, or Nurse Letby, but said nothing before the scandals broke? How many Catholic or Anglican leaders have conspired to keep their pervert priests away from Law & Order? All human frailties.
If folk want to do something meaningful re animal cruelty, don't bother making bandwagon gestures re horse or greyhound racing, there are huge targets, with zillions of animal deaths every year, in chicken sheds, veal production farms, and abattoirs everywhere.