The difference with dangerous dogs and dangerous horses is that vets, people etc will pts a dangerous dog with almost no secong thought but for some reason they wont do the same with horses and they should imho.
In say, Germany, a dangerous horse would be done away with without question, not so good ol GB.
And from what I have noticed, most amature people who are around horses regularly become very casual around them when the reality is, one misplaced kick will kill a child or some grown ups no bother!!