I am convinced the risk of losing funds due to unrecoverable backups is much higher than losing funds by being attacked.
That's why I prefer to have 2 different backup systems in place for the same data. I do of course test both systems independently, to see if I can recover them (before funding).Quote
It could be viable as a secondary backup, especially for being able to store a few wallets' seeds in one small convenient location, with separate, 'full backups' somewhere else. Like, if you have to move somewhere for a while or something, I get it that carrying multiple of my backups will quickly get heavy.
I couldn't help but smile at the thought of going somewhere, suffering under the load of all your Bitcoin backups 