Rate of complications in small exotics are directly related to the skill of the vet. We've neutered several chinchillas with absolutely zero issues. Beautiful surgeries, beautiful healing, and up and bouncing weeks later. Now happily living with ladies.
It's kind of a catch 22 -- most people don't neuter chinchillas because "it's so dangerous", but it's not any more dangerous than an average surgery with a skilled vet. However, a vet doesn't become skilled without clients bringing in those animals.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry