Stallions CAN be worked with - no question. Over the years, I've known and worked with several that were VERY polite and well behaved. However, my years spent working in barns have convinced me that the majority of stallions would be better off as geldings. Without a solid working partnership, a stallion is just plain too much horse for most folks to cope with. That includes working with 'em on the ground. Most folk here in the USA do a real good job of looking like they're TRYING to get the stallion to go psycho - Always segregated, unless it's breeding time, often cooped up for extended periods because of that, all too often fed so high they can't help but be wired - Izzit any wonder many of them I've had to deal with have had issues? Any of umpteen stall vices, snappy or kicky, cribbers, stall weavers, downright hostile - the list goes on?
Based on extensive hands-on experience, I have to say that gelding a horse would be more of a kindness in most cases. Geldings can at least go out and be horses with other horses. Stallions too often never have any contact with another horse except for quickies in the breeding shed, and with some outfits, not even then. Can you say "A.V." and "A.I.", boys and girls? Sure. I knew ya could.
And people wonder why their stallions are half-or-more crazy so often...
Having the hormones "in play", so to speak, defeats the main reason for gelding in horses. A gelding is MUCH easier to deal with in almost every way, and can actually live as a horse, rather than some sort of stuck-in-a-box sperm dispenser driven insane by the isolation and raging hormones. No... If you want a horse sterilized, take his balls clean. No vasectomy - at least in general. I have seen a few cases where a stud and his studly behaviors is a good thing (teasers, for instance) but something about him says he shouldn't be used as a breeder, thus a vasectomy rather than a castration was a viable option, but for the most part, if you want him sterile, go all the way and let him be the herd animal he is.