I've been to one rodeo when I was younger, and I thought it was really fun. I enjoyed it a lot.
I do respect your opinion, but a lot of horse sport are dangerous and were made for entertainment. For example, show jumping, it was designed to have high, colorful jumps just so it would bring in spectators and money. It was first judged on, if your horse refused or if you fell off. That's how you got faults. Now it's judged on time and if a horse knocks a rail over.
People would go see show jumping just to see people fall off.
Everyone has their own opinion, and if you don't agree with rodeos and how they are ran, then just don't go to see them or support them.