As I said in the topology thread, It's based on scan data, and I try to avoid sculpting as much as possible. I wanted to preserve as much detail as possible from the scan, and we would have smoothed the mesh anyways, so I built it at this resolution. This resolution is quite typical for scan-based models. The reason why you build models at low resolution normally, is so that you can tweak the model easily. Since we already have all the shapes from the scan data, we can simply use that. Plus, if I really needed to, I could go in and delete a few edge loops, and have a lower resolution mesh just like that.