Most dog owners are retarded and irresponsible and get dogs without any intention of actually exercising it regularly, feeding it quality meat or socialising with other dogs and humans.
Neutering dogs is similar to when adults put an active kid on drugs because they're too incompetent and lazy to manage the kid's behaviour.

If you got yourself a puppy, hopefully you thought long and hard about why and were honest with yourself and whether you can give it a good quality of life. If you actually take care of the dog and ensure it has lots of time to run around and be a dog doing what dogs naturally do and treat it well, then you won't need to chop its balls off.