You are all correct in your statements. It would be easier to simply connect to the laptop, however office logistics make it uncomfortable at least. I also have to maintain a somewhat un-techie looking office due to my position. I know that sounds odd but just believe me.

But the biggest reason to have connected through the Desktop for me is to make it usable from my laptop over wireless LAN (in my office so I don't walk anywhere) and when I take my laptop home anyone without computer savvy (which is basically everyone else) can just walk in and use the scanner. Nothing to plug in, reinstall, etc.....