I used to really push for people to add/edit metadata on their files so that they can really use MC in a powerful way. However, like many things in MC, I've found that some groups of people simply don't care, or strongly disagree, and simply want to use folder structures. I guess I can kinda understand. So I accept that.
For those people, like the OP here, you can set up a Categories view in MC that simply uses "File Path". Then you can just click on file paths and drill down through the directory structure and find what you want.
View > Add View > Add Library View > Empty View
Right Click on new view > Customize View > Show categories in this order > (click on first entry) > Edit
Type > File Path > (Optionally select a top level drive or folder containing your music)
Press OK multiple times to save your work
You might need to experiment with this a bit, but you should be able to get a working disk based view.
Good luck.
Brian.