Why aren't there more admin level graphical tools available for Linux? Or if there are, what are they?

I understand the usefulness of the terminal and how universal it is for troubleshooting across distros. But can't there be a way to make a nice graphical tool for the various admin level tasks that need to be performed?

Edit: Thank you to the outpouring of feedback on this. It has greatly opened my eyes to how much I don't know about. I did see a couple suggestions though, so I'll be sure to check them out.