Believe me, the horses are better for it. More tractable, eat better, no fighting. Using the old surgical method, I have assisted in various surgeries on horses, seen 'em get up & run around with no apparent discomfort after a few minutes.
Perhaps as much as 90% of racehorses are gelded, better and safer on them, the other horses and the handlers.
I wonder how many guys have tried to make their own tool like that w/ disastrous results.
It's considered good luck to throw the nuts on the roof for the crows. Or you could whip up a batch of Rocky Mtn. Oysters. LOL