I dont find paper/steel wallets safe. If a thief, or the government/police, or even a "friend" / family member, has access to it, it's game-over.
It's not without its own issues but wouldn't a passphrase derived from the main seed words not written down help with this to a degree? They could find the steel with the seed phrase but you could have any number of wallets on top of that seed.
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