> Developers deal with backups all the time (e.g. git, svn, cvs, dropbox, etc.).

Those are not backups, they are merely information stores. I have seen time and time again that restoring a site from zero is extremely painful due to how poor most developer tools are. In fact, some tools that are designed to "make things easier" actually don't make them easier for ops folks when things break. A personal bugaboo is startup scripts that aren't "portable" between shells. That might sound overly annoying, but when you discover that your SW isn't starting due to differences in environment variables in a dev vs prod environment that should never have been there, it'll make more sense.