> you can be locked out of your money quote easily.
But I am curious, do you have examples that show that this is really the corner case I should be worried about?
Not really, in these cases banks themselves decided to not give away "their" money
Something being illegal doesn't really say what can and cannot be done. Or what is a good idea. Or what is moral. It is a vague signpost and really only matters as far as things can be enforced.
Sanctions are literally "your money no longer exists". Or it does, but we refuse to allow you to transact with it. Financial access is a hugely powerful diplomatic/political tool.
Meanwhile people get "locked out" or just lose their crypto far more regularly. Lost passwords, crashed drives, hacked online wallets, rug pulls, crashing values, fake "pegs", misplaced decimals during transactions, etc. 20% if bitcoin is forever inaccessible, and that percent will only go up, never down.
The "you can be locked out of your fiat" cohort are the climate deniers of the financial world "If the earth is warming why was there a record low temperature somewhere yesterday?". "Your fiat isn't safe - just look how those donations to the truckers in Canada were reversed!"
Entire countries have had access to a currency completely pulled. Not just the US wants to use USD.
Plenty of people can lose access to their money, not just alleged domestic terrorists (and isn't alleged is a scary word?).
"Corralito" is unfortunately a common use word.