So what's your solution?
Have YOU set up and fully funded AFTERCARE for every horse you have ever bred or owned or trained?
Not one of the crying contributors on this thread or any other has offered anything of substance or value as to aftercare once they are done racing.
The Amish fill a void.
A void left by you and every person similarly situated.
What is YOUR AFTERCARE PLAN?
There are plenty of retirement organizations that will find homes for the horses. Are they perfect? No but it is better than the Amish. Unfortunately, the scum that send their horses to the Amish do it for the price they get for the horse/meat.