Need your advice and perspective about this. Am I thinking about this correctly?

Background:

The skids are PASed out—OSD since she was 14, and now at 20, remains completely estranged from her father. YSD, only recently PASed out a few months ago at 17, has also severed contact with DH. Neither daughter communicates with their father, despite the years he spent time, love, and all the care he has given them.