Just because of the guests' height, it's probably not necessary. We (he just under 2m, and I just over 1.8m) recently visited an acquaintance. His door frames are only 1.80m high (old house). My friend had no problems, but I bumped my head on EVERY door frame. For a very simple reason: I am used to being able to walk through every door frame upright. My friend, on the other hand, is used to automatically ducking his head (we even have a door frame at home only 1.90m). Although I find higher doors consistently more pleasant. It already starts when you just want to transport a slightly larger flowerpot :D It just has to visually match the room height.