I don't understand why TransferWise requires me to enter my bank username and password to verify my account. I believe it also uses Plaid behind the scenes, but

I don't understand why TransferWise requires me to enter my bank username and password to verify my account. I believe it also uses Plaid behind the scenes, but I used to be able to select "other" bank and enter my routing and account number manually. But as soon as I do that it recognizes my bank and switches to the login screen and I have to abort because I don't want to give it to them. I contacted support and they were not helpful at all.