I have two stalls that are like that, plus my horses are not on dirt. They have wood-chip padding and they eat off of black mats in the inside area so there is no dirt that gets into their intestines.
Horse properties are very deceiving from the front. You don't realize that the backyards are built for horses. And, by the way, not only do I have huge, "spa-like" in-and-out stalls for the horses, I have a seven-ton hay storage next to a double-car garage, plus a huge tack room, wash rack, two grooming places, storage for a boat and a double carport. Now, I ask you again, did you do your research before writing your letter?
Secondly, I think that it is inhumane to keep children in apartments when they should have a backyard to play in. I also think that it is cruel to keep a 20-plus-pound dog in an apartment. I also think that some of these bedrooms that people live in are too small for their beds, but we do what we have to do to enjoy life since the living costs are increasing and a lot of people can't even afford decent homes for their kids.
As far as your comment about a 200-pound person getting on their horses to ride, well, I applaud them for working long hard hours, taking care of their families, supporting their children in their outside activities and then enjoying their time to recharge their batteries to repeat the work week again and again and again.
Riding horses for young children with their parents is stimulating and also keeps them from getting into drugs.
I think you are just sore that a small and concerned horse community stuck together to preserve what they paid a high price for. I'm sorry that you can't drive another five minutes to get your organic food for your body.
I suggest you do your homework before you write a letter. We enjoy our passion. What is yours?