could they have done it at cost? Yes. Did they need to make a profit off this? Probably not. Are they relatively unaffected (due to prevalance of online banking and also reduced costs due to physical banks being closed)? Yes.
I don’t think they deserve undue sympathy, but they are far from unaffected.
Look at any global bank's stock price throughout this crisis. Being a lender to the businesses of a shut down economy is not very profitable.
If a big bank goes under due to coronavirus then I will of course apologize for being wrong, but I doubt that will happen. Too big to fail remember. So we bailed them out now they could be a little more civic minded. And as I said, do it at cost, pay your staff, but don't be thinking about the next dividend payments to shareholders or bonus remuneration to the CEO
I am not defending bailouts, I'm saying you should get your facts straight.
That said this crisis should have hit banks.