If no one addresses these notes for a while, they’re bound to get closed by a mapper more interested in keeping the notes layer uncluttered than resolving issues. By contrast, fixme tags can persist for as long as the issue remains.

This particular note seems to be intended to call attention to something that mappers could find in other ways, such as by an Overpass query, so a fixme tag would be redundant. In the past, I have opened notes during imports for things like “import source is missing lots of buildings here”, where anyone could help to resolve the note.