I appreciate the difficulty of large polygons.  However, I disagree it's "necessary".  Ideally, OSM would have layers where the parcel boundaries couldn't "talk" to the land cover layer.  But it doesn't, so we have to manually enforce some mapping best practices.  Philosophically, where the trees end and a parcel boundary demarcation has nothing to do with each other.  What sometimes happens is a future mapper will want to adjust the trees but they inadvertently also adjust the parcel boundary because of these connections