I can see the commission or regulatory agency, or even Apple needing the physical address, but not the general public. Absolutely no need for the public to know the physical address of a developer, or Trader if you will.
Let me give an example. I am a realtor in North Carolina. I have my own real estate and property management company here that I run from home. I do not have to provide my physical address to the public, or even provide it in ads, business correspondence, or my business cards. The only people I have to provide my physical address to are the govt. and real estate agencies who regulate and manage real estate practices. My wife sells insurance and is also a mortgage broker on the side, and the same applies to her. So, I don't get this rule for developers.
Now, all that said, we do have business emails, web pages with contact forms, and business phone numbers. If a customer has a problem with me that they don't feel is being addressed properly, they complain to the Real Estate Commission, and they come full barrels after me.