The risk is why I didn't suggest neutering. Plus I don't know the cost of it.
I remember when we had our rabbit, and were told to get her spayed or she would get cancer somewhere in her uterus. We spoke with an expert who had rabbits of her own. She said the rabbit was more likely to die of the operation, maybe even of being taken to the vet, than cancer, only she might die now rather than later. So we didn't get her spayed. The rabbit lived for years in perfect health until one day a cat got her.
Although there may be some benefits, I think they hype the spay neuter thing mostly because they just don't trust people with animals. The uncontrolled breeding is way out of control. But if you just have boys or just girls, there is no need for it.
Or keep them separate, but they don't think that separate is going to happen, so they hype the spay neuter thing. There was a story somewhere of rabbits or guinea pigs that were kept separate. One male slipped through the fencing and impregnated all of the females, like 30 or more, before they found him. We can see through the many oops posts on here that this happens all the time.