It’s not so much about even drawing every stud. The problem in my mind is that you really need a parametric house modeling tool. What if you need to move a window or door or add in another intersecting wall into a design? What if you want to change the sheathing, cladding or gypsum or add some exterior wainscoting.
Here is my perspective on the issue of modeling walls in SketchUp:
I understand the SketchUp purists and their need to do everything with native tools, buts lets be honest the native tool set is really just a basic framework for 3D modeling and does not give you the ability to do real BIM in SketchUp, at least not easily in my opinion. There is also no inherent parametric ability with a simple model even though some live components can get you pretty close.
The real power behind SketchUp is its API and the ability to customize SketchUp to do just about anything you can imagine (and I mean anything). I guess that is why I am so drawn to it, and even after almost seven years I am still developing my extensions very actively.