Here is the million dollar question... why not rename the /wordpress folder inside the zip to /blog?
Not everyone wants it in blog any more than they do in wordpress.
There are probably tens of thousands live blogs under the /wordpress public URL, and this is ugly! People are lazy and/or not savvy enough to rename/remove the default wordpress folder from the zip.
And herein lies my angst of making WordPress so easy.
I think that, if you're going to run a website, you (not you personally, you-whomever-is-running-the-website) ought to have some understanding of what's going on. That means, yes, I expect you to learn how to move and rename files. And I expect you to learn how to FTP files up and down, extract zips, and follow the directions from the Codex.
We all started out the same. Not a single one of us was born with the inherent knowledge of how to drive a car. But we learned. Running a website is, similarly, a learned skill. If you don't like how yours looks, you learn how to change it. Or you hire someone else to do it. But I feel you should at least make the effort to learn.
If you're too lazy, I got nothing for you. If you ask for help, I try to help, I try to show you docs on how to do things, and I've even spent time hunting up FTP tutorials. And yes, at the end of the day, I know there are people who just can't do this and can't get it. And to them I say 'Make good friends with a WordPress talented person and send them lots of cookies and beer.' That's what my neighbor did ;)