I think it can, with just a minor tweak to become:
Questions relating to general Information Technology, and any with no clear
GIS component, are off-topic here, but can be researched/asked at
Stack Overflow (software development), Super User
(computing hardware and software), Database Administrators
(relational databases) and other SE sites
By not limiting the list of suggested alternative sites to just the three named we are opening the way for GIS SE users to become more aware that we are but one of many SE sites that may be the best place to research/ask their question, depending on what their specific question is.
For example, the question Retrieving CSV from GitHub Repository for later use in ArcGIS Online? despite ArcGIS Online being in its title is not about GIS, but would be off-topic at Stack Overflow, Super User and Database Administrators. However, it looks like it would be fine on Web Applicatons.
There are too many general IT sites within the Stack Exchange network to name them all in that custom close reason but by simply opening it up with an "etc" it becomes valid for a question such as that above, and lets us keep count on how often we are closing questions that fall under general IT rather than GIS.