Yes but HL2 was not an RPG with character schedules telling NPCs to use said tables.
So? It's a reference, it has 3D coordinates and orientation, having the NPC use those to find how and where to use furniture would be fine, in fact, the addition of NPC schedules telling them to use the furniture would aid the game in cleaning up after the player, in that the NPCs who use/own them could check when they come home or go to sit down if their table and chairs are oriented right, and if not, pick them up if they were fallen over, or turn them to be in the right position. It would be tricky but only until they got the formula right, it's really not impossible, these people can code much more challenging stuff.
Heck, it could even be set in packages, either as tags like the "Lock Doors at Start of Package" or as an actual "tidy up" package. This could involve sweeping areas of floor wide enough to be swept, correcting misplaced furniture to a certain degree, maybe depending on how picky the NPC is, then going over with a rag any tables and counters, picking up loose items on the ground and whatnot. Could be cool to watch, no?