Creating a homemade ratchet solution to use mnemonic phrases with Bitcoin Core?

After Coldcard many have started to doubt hardware wallets, and OG-s like Saifedean Ammous have been proposing simply using Bitcoin Core.

But for me, core has a huge drawback - no mnemonic seed phrases. When using core, your seed is only machine-readable and has to be stored using digital media - USB drives, CD-s - which, apart from degrading much faster than a piece of metal, are physical.

I like the fact that mnemonic phrases allow me cross borders or escape tyrannical regimes with nothing but the clothes on my back and still have all my savings with me. I think it's a hugely important facet of bitcoin.

What i'm thinking is - is there a homemade ratchet solution for safely viewing the smallest amount of information in wallet.dat that one would need to restore ones bitcoin even if all his digital devices and backups are destroyed, converting that information into a binary string and manually matching 11-bit sections of it to words in the BIP-39 word list?

As i understand, in legacy wallets one could use the dumpwallet command which shows the seed in Wallet Import Format. That WIF could have been converted into 256 bits of binary and matched to 23 words in the BIP-39 wordlist, with just 3 extra bits to remember. But today, with descriptors and all that jazz, i don't really understand how it should work.

NB: I'm not trying to make Core accept BIP-39 passphrases. I'm just trying to find the shortest string of binary information i would need to always be able to restore my wallet in bitcoin core. The BIP-39 wordlist is simply an already available, widely circulated piece of text that's reasonable to use to make that string of binary information into a mnemonic phrase.