It's not just those darn windows admins. Alot of the certifications customers care about- SOC II, ISO whatever, FedRamp, have line items that require it.
I've had to install server antivirus onto my Linux laptop at 4 different companies. Every time it's been a pain in the ass because the the only antivirus solutions I've found for Linux assume that "this must be a file server used by Windows clients". None of them are actually useful, so I've installed them and disabled them. There, box-checking exercise done.