Firewall for Ubuntu - Gufw

iptables is already a very powerful tool by itself, but it's syntax can get awkward at times and hard to figure out, so Ubuntu developersdecided to make ufw ("The reason ufw was developed is that we wanted to create a server-level firewalling utility that was a little bit more for `human beings`."), which was to be simpler. Now, on the graphical side of things, Firestarer already existed. But why