Box Groups - rationale for setting up groups for job titles?

I have started working at a new organization. We have about 185 managed users. There are nearly 100 groups. Some are teams, but many are also individual job titles with one group member. I am trying to figure out why this was set up this way. I thought groups were for broader categories -- groups that need particular permissions. 

Does anyone else use this many groups? Any ideas of why one might set up groups this way? Or...is this an error in set up?