Like in all jobs, you get out what you put into it. Parenting is a job, a job that takes a lot of different skills. Even if you raise your child to the best of your ability, love, understanding, comfort, support, they still may wonder from a path that you would like them to take.
I find that a lot of parents just don't want to take on the "extra" job of being a parent, even though they have kids. It is easier for them, for their life, for their lifestyle.
They can and may very well be selfish. Plus they always think they are right, can do not wrong and their kids are a "reflection" of themselves.
Parents do not participate in raising and teaching children because of whatever reason they have that suits themselves, what ever is easier.
Like a six year old who plays a video game with a M rating, obviously a parent will attempt to shield your child from violence in a video game, but if you are the type of parents, who does not even care about ratings, like violent video games, plays these games with your 6 year old child, then the kids takes the car to school, it is the parent who should be held responsible. But some parents will blame every one else and then say: Well, he is a boy. Boys need the violence, they need to know how the real world words and those idiots that rate the game M, what do they know.
You see these people "think" they are smart, which is half the problem. I think an intelligence test along with a license would be required.
Like if little Sarah spills milk on the floor do you a)say, don't worry little 3 year old Sarah, accidents happen, no harm done. b)smack her across the face because she did this on purpose to tick you off so you have to show her who is boss, that might is right and she will regret the day she ever spilled anything on the floor again. or c)banish her to her room for two days without food and water to show her you are again the boss of her and she better be afraid.
I think after answering an test like this, the parents who choose b and c, would go into intensive "parent" training" in a camp/jail like setting to ensure that they have and know the correct way to punish a child. Now those parents of course would need supervision for life, just in case they resort to unacceptable methods.
Too many children die because of the neglect and stupidity of the parents.