I've been trying to do some research on them and the procedure, but I can't find anything but the vague "a surgical procedure that removes the the glands that produce venom"

I'm not really looking to keep a hot, but I'm extremely interested in them and I was curious to why more people don't use this procedure.
Though, I'm not sure if it's limited to certain snakes, and not necessary in others. I can see how it can be useful, since most say it doesn't cause much distress to the animal.

I would love for some more informative.. information (lol) on venomoids and the procedure.