Attached Link: Digital Photographers SLR Kit

Actually I cant see what you really Mean

I Quote your Question
why are real world things frowned upon in Poser?

they do this in here every day, and are not any better then others
fact is that the Poser creators just don't admit the real facts :)
but they still will do it behind doors ,will there be a confrontation with one 
of the products in the Poser Stores the answer will be , there is still a
slight difference !!!