People pay for puppy training so why not parenting?

A question for you: If you had a new puppy (or if you got one), would you invest in puppy training? And if you would, why? Question 2: Have you ever invested the same amount of money in developing your parenting skills? And if not, why not?

I have been pondering this for the last few months. Most of my friends now have a dog and all have invested in puppy training. And the training is so worthwhile – it makes a huge difference for the family and the dog.