Actually being directly in a position to see how seriously this is taken by the banks, mobilizing to address the problem of staff using non approved and recorded communications is massive and doing exactly what the fine is supposed to do - motivating the companies involved to get off their arses and fix the gaping holes that allow this to happen.

Source - I'm the guy on the tech side who has to come up with solutions to allow communications with clients/peers/other firms over whatsApp, Signal, Line, SMS etc in a way that is able to be archived in line with the law