If banks freeze our accounts, how does crypto help if we can’t get any fiat from it?

Sorry if I’m missing something obvious here, but it doesn’t add up. Everyone is saying unbank yourself, but when you sell your crypto, where are you getting the fiat from to survive?

Most countries and places don’t accept crypto as payment yet. Don’t most people sell their crypto on the exchange and then send it to their bank for fiat? If your account is frozen, then how do you take out your crypto profits?

Again, my apologies if I’m missing something obvious here but it doesn’t make sense to me.