For robotics … not that bad. During my PhD years, some colleges were using UDK, mostly as a visualization tool.
However, using UE4 for the development of “office” programs, not so much. It can easily be an overkill.
But again, it depends exactly on the programs.
You said “all kinds of programs to count things, translate, encrypt, show some selected information from cvs files”.
For simple things like that, Python or even JavaScript is far more efficient (in terms of resources and practicality).
Somehow, using UE4 to develop encrypting programs, especially in BP, is way too wrong.
But at the end of the day, the tools are there, and you are free to use whatever you want.