The only way you're not relying on single points of failure is through multisig.
The only way to distribute your seeds with backups in enough places to not have a single point of failure is through a 3of3 (minimum).
If you want to bury the 6 seeds in 3 different locations that's up to you.
Saying my way is bad because you hate banks is fine, but you're not taking into account that you have no idea what my threat models are or my inheritance plans.
My way works the best for most people with less complexity than burying things in the ground.
If you can't create a 3of3 properly, use a Bitkey.
If youre stuck with Singlesig memorize it and a passphrase then back those up in multiple locations anyways.
Doing all that work for a singlesig is brutal because the 3of3 is far superior.
