WELCOME ABOARD!
You're right that it looks completely unnatural, but it's still new. Until SH3 there was never a sub sim with crew management or 3D views. That sim introduced crew members manning the guns and depth charge racks. SH4 introduced crew members walking around on deck and lifeboats.
Give them time - there will be more in the future. But for now, that's the best they could do with what they have.