Actually you can do many things in code without using the editor, so it's ok.
Also you have the options to add custom input masks and a lot more for your scripts in the editor.
I really like that, but haven't tested yet. It is a bit similar to the WED panel modding via code comments, but can do a lot more.

I had the very same problems with the Untiy editor when I opened it up the first time. A short read of an introduction chapter in a newbie book helped to overcome this issue very quickly.