Occasionally, parents aren't able to give proper care to their children, no matter how much they love them. The child might need to be cared for by a guardian if one or both of the parents:
-have a serious physical or mental illness,
-are in the military and have to work and stay over seas,
-must enter a rehab program to take care of some sort of addiction,
-are going to be incarcerated for a while,
-have a alcohol or drug abuse issue,
-have a history of abuse,
-can't provide proper care for their children for other reasons.
The judges will alway take into account what is in the best interests of the children and make sure that the child in question will be raised and cared for is a safe, loving and stable environment. The guardian is put in place to care for the child when the parents aren't able to.