Why do you say that?
Cause there is a realy big difference between a scripter that works with AI and the .txt files inside Script folder and T-SQL (this last one not allways known by all), and a skilled developer, with RCE and C++ knowledge that can do anything with the files, and understands the whole framework. Of course if you bought the files and extender from Vanganth or from Dear Fr3ddy, you don't need a "Developer" but a scripter, cause all other stuff is done with the money you spent.
Of course beware, there are also people that are just good in copy and paste, and they don't have any idea about AI or scripts. Also there are people that try to appear to be a developer or scripter and don't have any idea, or scripters trying to appear to be developers, i know this sounds crazy and weird but it happens and realy often.