At least buy OP a drink before psychoanalyzing their relationships that aggressively without any evidence to go on beside your cultural assumptions. Mere participation in this community is a beaming, reliable signal that you’re probably not Dr. Phil, so I’d suggest listening rather than explaining familial bond to someone you’ve never met.

If you said something like that to me in person, your evening would not go the way you think it would, and you’d find yourself in a conversation about your departure from the circumstances that allowed you to offer that perceived wisdom.

Some people rely on their tech to take care of a lot of details, and simply forget the edge cases sometimes. People are human and make mistakes. It's pretty disrespectful to jump to conclusions about their relationships.