Ponies look peaceful. Many children just love ponies. In the summer in the park, I often see how children roll on ponies. I think that the content of ponies for such purposes is a profitable business.
Originally ponies were bred for towing trolleys in coal mines during the industrial revolution. Apparently they have great traction. So do not underestimate them. This is the case when the size does not matter :)
I hope you had a good day