If you want to completely destroy any trust or faith your friend has had in you, then that's the way to go.
Please do read up a lot on hoarding and on how to interact with hoarders. No one can be forced or shamed into taking action or even recognizing that they are a hoarder. It is a marathon process not a sprint.
Do lots of reading on this board and check out the books. You will, as a pastor, encounter this problem more than once in your congregation or friends or neighbors. For me it took years to realize I was even one! And I would have been terrified if someone came in and took control without my consent or cooperation.
Sometimes a person will accept help in cleaning up, period. (In other words, not decluttering necessarily but actual cleaning.) It might be becoming too difficult for the person to do daily chores or she may have just emotionally given up.