A lot of people are either intimidated by rather simple things that just seem like they should be difficult (updating graphic card, etc) or aren't sure of what to get. Having a system that you can literally put the disk into, install and update is pretty convenient if you don't know what you're doing with a computer.

Unfortunately for them, computers are pretty easy to upgrade and also consider that this is a pretty old game so any computer you buy at say, Best Buy will likely run it decently. You can pretty much pull it out of the box, play with it for a few minutes and get the game to run.

But if you really don't want to do the work or research, buying a console is a decent option (but really, who doesn't have a computer these days?).