@CorrBlimeyGG
I'll make it two. Surely you can find something better to do? Something that doesn't cause unnecessary suffering to animals perhaps.
I should know better but I will bite.
Nothing wrong imho with an animal which is all about movement and speed doing what it is bred to do. Welfare standards in racing are improving all the time. And training methods have improved massively in the past 15 years. Many people work very, very hard in the racing industry, 24/7 in all weathers, to provide excellent of their horses. As in all industries, there are a few bad apples which need turfing out.
If you don't want beautiful thoroughbreds to exist then ban racing, because people will find it very hard economically to keep them for fun. I have a heavy horse and these amazing ancient breeds are dying out because they no longer have a job to do and people can't afford to keep them as pets. The Suffolk Punch for example, is rarer than the giant panda.
For those really concerned about horse welfare, and "unnecessary suffering" go and poke around in a few fields in the home counties, where abandoned and outgrown laminitic hairy ponies are kept in the flat same boring small field, day in and day out, with no environmental enrichment, and very little activity, and are rarely visited by their owners, a farrier or a vet, with constant foot and digestive issues because they don't get enough exercise.
Horses have evolved and have been semi domesticated for centuries to live alongside man. That means that all types and breeds are best served to do the activities they were bred for or similar/equivalent. People have a strange notion that herds living in the wild have a brilliant life which they don't necessarily. Most herds need a minimal intervention from man to keep healthy so they are rounded up twice a year and immunised, treated for worms, have their feet looked at etc. I've seen wild herds in S. America where horses are half starved, limping along with terrible injuries, flea bitten and thin. It's not as simple as wild and no job = good. Domestication & in work = bad.
Anyway a thoroughbred is built for racing. Some thoroughbred horses absolutely love galloping, they love going to race meets, they enjoy the atmosphere, they love the speed and it's difficult to stop them once they have started . Some absolutely hate it. All horses are individuals just like humans. (My horse rushes up in to the horse box and loves going out!). It's hard to get a 500 kg animal to cooperate if they really don't want to do it. Look up the story of Mad Moose!
And lastly, adult people are allowed to make their own judgements and hold different views on (legal) activities to others. The last time I looked, the UK is a free and democratic country. That means tolerating people who do things you don't approve of and don't want to do yourself. I feel the same way about motor cross churning up woodlands and scaring the wildlife, but I wouldn't go on here and admonish someone who asked about motorcross meets this Christmas.