While any surgery has risks and sometimes things happen no matter how good a vet is, did you make sure you found an exotics vet that has a high success rate? If not, then find one.
http://rabbit.org/faq-how-to-find-a-good-rabbit-vet/
If you have a good vet the risk is less than 1%. The risk of a female rabbit developing reproductive cancer is around 80%. Its definitely worth the risk. Just find a good vet.
Neuter is a neutral term. Males get castrated. Females get spayed.