I think a lot of Wayfarers in Australia submit them, regardless if they are or are not eligible based on criteria. They see a survey marker in their neighborhood along the road or sidewalk and think it’s eligible, but it typically isn’t noting a great place to explore, like noteworthy landforms or ones with unique histories. The last part of the clarification focuses on these markers that aren’t in interesting places or have historical value, like many used to map out a neighborhood.
Some reviewers may also not fully know the criteria, as not all visit the forums or the help pages, which also includes the clarification. There may be other reasons, too, but usually it tends to be that they have seen the markers in-game and still think they are eligible, even though criteria does change from time to time. So, even if you do see game play locations at these markers, they may have been approved before there was clarification, and some may still get through if reviewers don’t fully know about the clarification.