Jessica,
Although I am not an expert or dr either, I agree with your beliefs. There are just certain things mother nature put into place for a reason. And if the need does NOT arise to change it, then why not just leave it alone?
However, I will have a different dillema. I have a 2 1/2 yr old male shepherd, Diablo, whom I have had since he was six weeks old. He is without a doubt the best dog I have ever had and will ever have. My son and I worked very hard to train him and he is just a great, well balanced animal! We love him to death. We love him so much that we went and bought him a female shepherd to keep him company. Ginger, a 3 year-old whom whe rescued from a GS rescue at 18 months of age, is also a great dog. Since she is from a rescue, she is automatically spayed. She gets along with Diablo and together they make a very happy brother/sister love/hate relationship. Diablo is not neutered and he never will be. If the opportunity arises to breed him, (he is AKC and just gorgeous), then so be it. But if not, that's fine too. As long as he doesn't require the procedure for anything medical or behavioral, then we are just going to leave well enough alone.
As for baby Chuey here, the same will apply. He is strictly and indoor dog and with diligent house breaking training, we can get him to adapt to not marking everywhere. Hopefully he will feel well enough that he won't have to!
Sorry that my post was also so long, however, I felt I had to be the voice for my well behaved boys!!
Thanks for your time and support!