Although I would contest the "only", as there are other contexts
where they general or abstract terms can exist, depending on
what one considers valid evidence.
"Does Love Exist?" - looks up concept, finds analogy that ties
concept to something tangible. The something tangible might be
behavioral, societal, a statue of Love, Laws of Love, etc... all
of which can lead someone right back to Platonism if they're not
careful, because it can be said, "Love exists" in _some_ rough
shapes that seem to correspond to the perfected forms, therefore
the perfected forms must exist somewhere... and... of course,
they do...
..as written in the place you read about the concept.