turtlepeas

Hello, all. I'm in the process of finally trying to launch an adult site and have most everything I need. I've read and researched but cannot find the answer to this question: why do the parent legal business names of any given site exist in name only? Beyond the obvious answer of anonymity, is there any other reason for this practice since it seems to be such a standard operation procedure?
I've never looked up "such-and-such media" and seen so much as a simple landing page to the effect of "we shoot porn" or even "we produce digital media".. What are the pros or cons or reasonings for this so that I don't make any regrettable newbie mistakes?