Not all that different from losing your physical wallet with your ID and debit card or giving your bank info to a Nigerian Prince.
Pick your poison, do you trust corrupt institutions or yourself more.
Dude.
You lose your wallet, you make a few phone calls or walk into a bank and get a new card. You lose very little more than some time. Losing your crypto key means you lose your crypto.
Those are not at all the same thing.
“I trust my midwit brain rather than the institutions that makes the modern world work” really isn't the flex you think it is.