How about why YOU(the audience) should consider horses as a recreational hobby. The physical benefits of riding and the emotional, mental, spiritual benefits. How therevreally is something for everyone when it comes to horses. Everything from competition to simple pleasure riding, the community and fellowship with other riders.... Convince these people to get in the saddle!
You are not out to change the world here, and you don't want to talk over their heads. They might not know what a bridle is, let alone hippotherapy. Identify your audience and keep it simple.You aren't talking to vets veterans or even legislators. You don't need to get too in depth. You just have to be convincing.