Well, racehorses that go to slaughter at least go relatively QUICKLY, as opposed to being neglected in some weedy barbwire pasture to starve over months or years. Yes that does happen.
And most of the racehorses that go to slaughter (not all, but *most*) are there because the racing industry (not all owners and trainers, but *most*) is set up to get whatever it can from a young horse as quickly as it can, and when the horse's body breaks down then you discard it and start with a new one. Very very few horses retire from racing without at least some physical problems, and a huge number (the racing industry is 'oddly' reticent about producing actual numbers, but it is probably upwards of 50-70%) wind up with major lameness or other problems that will make them permanently somewhat uncomfortable or limited in what they can do.
You can't compare this to middle-aged former human athletes with aches and pains... there is no possiblity of 'informed consent' for horses
A number of the 'somewhat impaired' horses make terrific riding horses, as long as you're experienced with training horses (or buy 'em from someone who's done it for you already) and are willing to stay within the limitations of the horse's past injuries. However a distressingly large number of ex-racehorses CANNOT be useful as riding horses, either because their brains are too fried for any but a few really talented people to handle, or (much more commonly) because their leg injuries will never heal well enough to permit even light recreational riding. And there aren't that many people who can/will keep unrideable horses.
I don't think it's at all realistic to expect there EVER to be enough good homes to absorb all the racing industry's castoffs. There aren't close to being enough homes for all the OTHER unwanted horses in north america either! The problem is basically that the racing industry produces such a
huge number of mostly-untrained often-partially-and-sometimes-totally disabled horses every year.
So, think about it next time you're tempted to spend the day at the races as "entertainment"
Sorry to sound so militant about it, but this REALLY bothers me,
Pat, a horse person
long before I ever discovered chickens, with two ex-racehorses (a 20 yr old retiree, and a 7 yr old with an old very badly bowed tendon who is learning to be a dressage horse, just for fun not for showing).