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?
This is your money and you can chose how you want to go about it. Deciding whether to let any one close to you or any member of your family to know about your seed phrases is up to you. If you trust them so much, you can reveal it to them but you should be ready to bear the consequences if things goes against you or if a betrayal happens in the end. I wouldn't want to say that one should die with the information to their assets instead of passing the security information to another but you should apply wisdom and if possible make sure you have two wallets, reveal the seed phrases of one of them and keep the other to yourself as an alternative plan in case you face any betrayal from the one you revealed.