Not true. We can hijack the banking system using Bisq.

https://bisq.network/

Suppored payment methods:

    Advanced Cash
    AliPay
    Cash Deposit
    Chase QuickPay
    Face to face (in-person)
    Faster Payments
    HalCash
    Interac e-Transfer
    Japan Zengin Furikomi
    MoneyBeam (N26)
    MoneyGram
    National bank transfer
    Perfect Money
    Popmoney
    PromptPay
    Revolut
    SEPA
    SEPA Instant
    Swish
    Transfer with same bank
    Transfer with specific banks
    Uphold
    US Postal Money Order
    WeChat Pay
    Western Union
    Zelle

And no, I don't think they asked permission.

It's so funny. Whenever people say you can't do X with crypto, there is always something they don't know about that proves them wrong.