Yes, they should follow this pattern. There may be some exceptions but most of the hint texts should be possible to track back to their related tiddlers. …
IMO it would be an extension to the “system” search filter.
There is a discussion here at Talk - Can we make standard search a little smarter? - #8 by pmario and Can we make standard search a little smarter? - #12 by pmario where I did some brainstorming about a TW specific “ranking system”.
But except from that brainstorming I didn’t do any further development. … I did create the field-search plugin which is OK for my own usecases.
@Mohammad has Advanced Search in Fields which is discussed here Advanced Search in Fields Plugin: New Updates
IMO none of us did implement a feature that would find the relation between a hint tiddler and it’s origin.