I don't know if you're joking, but horses aren't much fun to share a road with either. They're slower than the traffic and literally defecate anywhere. It's positively impressive how much urine can be left behind at a stop light.
Road users come in many types. At one point cities were full of horse shit and now they are full of smog from vehicle fumes. No matter your preferred choice of ride, other people's choices may interfere with your day, but it is your choice if you let that get you angry.
Personally, I think people who become dangerously enraged from having to deal with other forms of transport, should probably not be operating a motorised vehicle on the public roads in the first place.
To be sure, driving emotionally is a terribly dangerous thing to do. Personally I thought it was cool to see the horses, but the plant engineer in me fears animals on the road (no matter how big). And the motorcyclist in me fears the giant heap of poo to slip on.
My attitude is whatever has the most momentum gets right of way; but again, I think forklifts will do that to a person. I doubt I could ever have the nerve to ride a bicycle in a city.
