(b) The legislature further finds that many children who have been placed in foster care experience unnecessarily protracted stays in such care without being adopted or returned to their parents or other custodians. Such unnecessary stays may deprive these children of positive, nurturing family relationships and have deleterious effects on their development into responsible, productive citizens. The legislature further finds that provision of a timely procedure for the termination, in appropriate cases, of the rights of the birth parents could reduce such unnecessary stays. It is the intent of the legislature in enacting this section to provide procedures not only assuring that the rights of the birth parent are protected, but also, where positive, nurturing parent-child relationships no longer exist, furthering the best interests, needs, and rights of the child by terminating parental rights and freeing the child for adoption.