I totally agree that how you raise them is important, but I disagree that it's "all" in how you raise them.
Their genetics are the biggest determining factor, that is why
breeding is so important. For an extreme example, all the sled-pulling in the world isn't going to make my dog into a Husky
... and all the early-rolling in the world isn't going to make a Husky into a bulldog
That said, you *can* mold dogs in either a positive, or a negative, direction through upbringing ... within whatever genetic limitations they have.
Jack