I'd expect most software uninstallers to do the same thing. That's why we should use package managers instead of letting users choose where to put things (or fully encapsulated app objects rather than using installers at all).
Most software on Windows only erases files that it installed, and leaves the directory in place if there are any other files remaining. Sure it may be annoying to clean up if you mind orphan stuff, but it's way better than the alternative.
