I've sure been tempted, and my honey's offered more than once
But nope, a horse is too much investment. Roosters can be found anywhere, folks would pay you to take them. Plus, it's socially unacceptable here to eat the horse once you've shot it, and burying a horse corpse on my little acre swamp would be a logistic nightmare. I did take one to the auction the night he dumped me on the road in front of a school bus, though. Butthead.
If I had a horse physically attack me as the OP's rooster did, I'm pretty sure it wouldn't leave the property alive, logistics or not. If it did live to get in the trailer, it would be a one way trip to the big cat sanctuary. I know darn well a dog that attacked wouldn't be walking off the place, or any other animal. Yeah, it's a steep learning curve, but it also removes those genes from the pool.
When I look to purchase a horse, I look for one that's been domesticated and bred long enough to have some of those instincts bred down. I then train the horse to control their response to their instincts. I can't train them not to be afraid, but I can train them not to move when they're afraid. I buy stock-type horses, big heavy things. Not mustangs or more feral breeds/types.
Dogs, I go for labs, or generic big black dogs. Or purely ornamental dogs like my current pup. No pit bulls, no Dobermans, breeds like that that had aggression bred into them.
Same for a rooster, for me. When I look for a rooster, I choose breeds that have been long domesticated and those instincts have been dampened. I don't go for gamecocks or Oriental fighting-bred birds, I go for nice, heavy, boring farm birds. I train my cockerels (and hens) from the start to respect me and my space, just as I do with all my animals. Pretty much every animal on the place will respond to the verbal command "move" by getting out of my way. I say pretty much cause sometimes cats need a physical cue, also
. Oh, and the partially deaf pup needs a physical cue. Other than that, they're all trained to do it. Horses to hens. I've posted numerous times about getting a rooster to keep a respectful distance, no need to type all that again.
I firmly believe an animal that attacks a human should be dispatched. I just don't see a way around that. I'm not going to live my life in fear of a rooster, for heaven's sake!