the nice foster parents are people who (a) want to help care for a child in need or (b) are looking to adopt and feel the urge to go through the foster care system instead of adopting a healthy white infant or an international child.

literally some people have a calling to be foster parents. and they do it because they are helping a child develop and grow as they are being the "good" parents that the child needs.

they are stepping in for the parents of the child, providing safety, caring, good role modeling, comfort, patience, teaching, love, etc, etc, etc.

and yes, to be a good foster parent is a HUGE commitment because parenting foster kids is not like parenting your "normal/average" kids. most foster kids have behavioral and emotional problems and act-out in ways they were taught or need to to survive. most don't trust and most don't attach.

if you love being a parent, the rewards can be tremendous if you look in the right places. for example, one foster mom told me that even the smallest improvements are rewards to her, after i only crayoned swear words on two walls instead of the whole room when i was upset once as a kid.

or for example: i used to hide food all over my room because i was not used to there being enough food and i was afriad it would go away and i would starve again. my foster mom was so happy when i started bringing perishable items that were going bad to her instead of letting them rot in my room.
big step for a kid like me bringing a rotting banana to my foster mom, but not normal.....

unfortunately there are not enough good foster parents. ask any long term foster kids and they will tell you that most of their experiences were "bad"...