Not doubting you on this, but I personally have not experienced any issues with rear door trim, or any trim so far. And I DO open and close my doors oftenI get what you are saying but the trim on the rear doors comes off just opening and closing the back seat doors.
My only gripe about any of the trim is the inevitable scuff marks your shoes put on the lower inside door panels. Pretty much true for all modern cars though.. so it comes with the territory.