I've been playing a bit with toolbox, what is it intended for?

I understand that was intended primarily for immutable OS. But documentation says that it can be used on the Workstation edition too.
AFAIK it's only useful if you don't want to mess up your /usr of your host operating system by installing apps. Beyond that, you can happily destroy your very $HOME, from overwriting dot files to removing any other of your important files.
Am I missing something?
Please correct me if I'm wrong.
Thanks in advance!

Sergio Belkin
LPIC-2 Certified - http://www.lpi.org