I haven't set foot in a bank branch in over a year, and then only to deal with a problem caused by the confluence of their antiquated model and that of another company.
I've never once made a phone call to, or received one from, my current bank in the ~7 years my current checking account has been open.
I don't know who you think they're maintaining such anachronisms for, but it ain't this free checking user.
The computer systems have to be created and maintained for their wealthy depositors regardless. The marginal cost of adding less affluent customers is laughable, and more than paid for by the interest they can earn from a few hundred dollars in deposits.