Does your dog have to know basic commands to be well behaved?
The answer is No, they do not! Here's why:
It's similar to children. Some parents have experienced raising two children in a completely different way. One child always did as told, never really got into trouble, did well in school, etc. The other child required a lot more discipline, guidance, and direction. Both children had the potential to be great members of society but one just required more than the other.
Some dogs are instinctively good and some need that extra guidance to know how to be good.
With that being said, it is always beneficial to have a well trained dog. This comes in handy when you have to load your dog in the car, take him to the vet, take him to be groomed, take him on a nice walk around the neighborhood, or if you just want to show him off!