Everything is a matter of comparison. Yes, it's theoretically possible that programming the ability to sit down is more difficult than, say, programming FPS combat. But I would be very surprised if that were the case. In Skyrim, for example, you could mod it in in about 20 minutes.I'm sorry to break the bad news to you. But you have NO IDEA what it takes to code crap with your incompetent statement.
Coming from a coder, look at all the things you have to do just to sit in a chair:
Create a 3D model of every size from height to width to angles from every direction of that chair.
All of the models that the 3D model can interact with.
The thousands of frames to create the motions of interactable models.
The lighting and changes with the motion of both models.
The models of everything that comes within or just around that model.
By now we are on around the 500,000th line or close to now.
And now the fun thing that all coders LOVE to do is rinse and repeat all of these things within BILLIONS of coded lines that are already there that incorporate and interact with all of the backdrop settings of different areas just for that one stupid chair.
Really simple isn't it......
PS. Programmers don't like to be called coders.
Yes, programming can be difficult, but don't make it out to be some impossible task.