I don't think anybody with a sane config need fail2ban or similar. But as a sysadmin who works for clients who don't understand such concepts, sometimes it's e

I don't think anybody with a sane config need fail2ban or similar. But as a sysadmin who works for clients who don't understand such concepts, sometimes it's easier going "okay, we will install it on your systems for $x" than explaining why it's useless. It's a business politics tool.