When I played Paramox I assumed this was to prevent it becoming too easy to have souped up golems. I did get a few body parts into mine, from kills I made myself. It seems to me that this is a fair enough way to do it, rather than -always- be able to take other people's body parts (from other people's kills).

I don't really see a problem with using other people's, but I'm just not convinced that being able to locate them is a good idea.

If I remember correctly though, gravesight can already be used to locate bodyparts, just not in one step.