It sounds like you've got it... Keep in mind the term Focus doesn't just mean "focused on as a problem" -- it's more generic, it can just mean "focused on". That's why it's better than Symptom ... it's more broad and requires less weird phrase-twisting.
Like in a story where Help is the Focus, a group might be focused on providing help to someone. In that case they don't see the help itself as the problem. They might see the person's need for help, or helplessness, as problems, but you might have to twist things to see it that way.
Like if the person needing help was say, someone with cancer, and they were raising money for alternate treatments, they probably wouldn't say "the problem is her need for help". They'd say the cancer is the problem! But that doesn't mean the Focus isn't Help.
Still, I do find you can usually phrase it as Symptom decently. Like in the above example, maybe the inadequate help of standard chemo treatments is what they see as the problem...