That statement is ridiculous. I'm talking about one platform running 2 operating systems, and you're dragging in 2 systems that will cost extra for someone in hardware.
The Operating System is a big part of the platform. Hardware in a Mac is nearly identical to hardware in a "real" Windows system, with the main difference being the branding and the OS that runs on it. Just like my Linux machine has all the same hardware as a Windows machine, but the OS makes it very different. When running Bootcamp, you have to shut down the Mac OS, and reboot the machine into a Windows environment... you are no longer running Mac OS, and cannot run any Mac apps until you reboot again (and then you can't run anything under Bootcamp until rebooting again, etc).
This is to say nothing about also having to buy Windows and maintain/patch/upgrade it. It's the same hardware, but it may as well be two different systems.
And about the only real option to play skyrim with mods
If there isn't a native Mac port (I would hope there are Mac and Linux ports, myself), then Wine may be an option, too. It's free, and integrates the app somewhat into the Mac environment -- it's not perfect, though, and it may take a bit before it works correctly, but it saves you from having to buy Windows and use Bootcamp. IIRC, Gix has a Mac, and uses Wine (or one of its commercial counterparts, Crossover or Cedega) for his Morrowind and Oblivion LPs.