I'm not an expert. However, for all the countless snake breeder videos I've watched over the past several years....NO ONE that I ever saw discussed issues with unfertilized follicles being a problem that would require surgery. I could be wrong, but what the vet said to you seems TOTALLY off to me.
Don't blindly trust ANY vet who is helping you with an animal, esp. if that animal is outside his specialty. (Bird owners are ADAMANT about this - they go to certified avian vets, and fish people even get fish specialty vets, but I don't see much in the way of practices devoted specifically to reptiles...still, too biologically diverse as a group.) If you get an opinion that sounds odd, ask the vet to steer you toward some source material for your own further research. If he/she knows his stuff, he should be able to either give some reference, or explain specific past cases in his OWN practice that have led to that opinion.