“Parent should not decide” what do you mean by this? 
I will tell one thing that all child’s development experts agree on:
Children should have equal access to the time, love, and guidance of both mother and father when they live in the same community and both are fit, willing and able to parent their children.

Also both fit parents need to have the parental rights. Mother’s rights and father’s rights should be equal. 
We don’t want to adopt the Nazi approach which was build on “the children’s rights”.
The best interest of the child was originally a slogan designed by Hitler’s social engineers.

“The state must declare the child to be the most precious treasure of the people. As long as the government is perceived as working for the benefit of the children, the people will happily endure almost any curtailment of liberty and almost any deprivation.”
-- Adolf Hitler