The state office or local office may on its own motion or at the request of the court intervene in a guardianship or conservatorship proceeding if the state office or local office or the court considers the intervention to be justified because of any of the following:
1. An appointed guardian or conservator is not fulfilling prescribed duties or is subject to removal under section 633.65.
2. A willing and qualified guardian or conservator is not available.
3. The best interests of the protected person require the intervention.