The problem of seeds is obviously crucial. Can we imagine being the one and only person who knows what to do with these 12/24 words? How to keep them safe, but also how to pass them on to heirs or friends (so that they know what to do with them?). Informing others while preserving your own security can be a real challenge in some countries.
And then there's betrayal, divorce etc...
What are the solutions?
Loyalty is an important thing, sometimes even people who are blood relatives betray you, so how reasonable would it be to trust your wife? My family consists of four members, son, a daughter, myself and my wife. At this moment, I have no choice but to trust my wife. My wallet has 24/12 words Seeds, and there is no other member to explain it except my wife. So I was forced to give my wallet Seed to my wife. I can't do anything if my wife cheats on me because right now I don't have anyone else to give Seeds to except my wife.