Hey @gustojunk,
here a quick prototype in a Python script that you can drop in a toolbar button. The GitHub page for the script is https://github.com/jesterKing/rhipy/blob/master/SelectNakedEdgesInVolume.py, and direct load link (copy/paste into EditPythonScript for quick test, remember to save, and/or put in toolbar):
https://raw.githubusercontent.com/jesterKing/rhipy/master/SelectNakedEdgesInVolume.py
This first asks to select an open mesh (mesh that has naked edges), then an already created solid polysurface. All naked edges fully contained in the volume will be selected. There are many improvements to be made, but this may already alleviate your selecting anxiety.
See Running Python scripts from aliases or toolbar buttons with instructions how to put Python script in a button