That's simply not factually correct. You can use bank web sites entirely without a smartphone. Banks supply this option as there are really - surprise! - people without smart phones who still has money.
My own bank does not even use 2FA. I log in using the officiel state sponsored digital ID (yes, without having a smartphone). This is in Denmark.
(sorry about the new anon account, it's been so long since I posted I've forgotten my old account. Perhaps I should use a PW mgr...)