When I worked a bank at $oldjob, compliance mandated we had a full-blown anti virus engine (from Microsoft or McAfee, "at your option") deployed in quasi-ephemeral container images.
It does not have to be reasonable, it doesn't have to be a net positive - it just has to tick some box on some compliance sheet for this to be required, and I will never again be able to perform a banking transaction from my personal computer or degoogled phone again.